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feat(theme): Branded theming via brand_yml (#1743)
Co-authored-by: Carson Sievert <cpsievert1@gmail.com>
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‎CHANGELOG.md

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* Added [narwhals](https://posit-dev.github.io/py-narwhals) support for `@render.table`. This allows for any eager data frame supported by narwhals to be returned from a `@render.table` output method. (#1570)
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* Shiny now supports theming via [brand.yml](https://posit-dev.github.io/brand-yml) with a single `_brand.yml` file. Call `ui.Theme.from_brand()` with `__file__` or the path to a `_brand.yml` file and pass the resulting theme to the `theme` argument of `express.ui.page_opts()` (Shiny Express) or `ui.page_*()` functions (Shiny Core) to apply the brand theme to the entire app. (#1743)
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* `chat_ui()` and `Chat.ui()` gain a `messages` parameter for providing starting messages. (#1736)
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### Other changes

‎docs/_quarto.yml

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url: https://matplotlib.org/stable/
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python:
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url: https://docs.python.org/3/
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brand-yml:
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url: https://posit-dev.github.io/brand-yml/
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inv: objects.txt

‎examples/brand/Monda-OFL.txt

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Copyright 2021 The Monda Project Authors (https://github.com/googlefonts/mondaFont)
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This Font Software is licensed under the SIL Open Font License, Version 1.1.
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This license is copied below, and is also available with a FAQ at:
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https://openfontlicense.org
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-----------------------------------------------------------
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SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
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-----------------------------------------------------------
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PREAMBLE
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The goals of the Open Font License (OFL) are to stimulate worldwide
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development of collaborative font projects, to support the font creation
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efforts of academic and linguistic communities, and to provide a free and
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open framework in which fonts may be shared and improved in partnership
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with others.
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The OFL allows the licensed fonts to be used, studied, modified and
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redistributed freely as long as they are not sold by themselves. The
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fonts, including any derivative works, can be bundled, embedded,
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redistributed and/or sold with any software provided that any reserved
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names are not used by derivative works. The fonts and derivatives,
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however, cannot be released under any other type of license. The
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requirement for fonts to remain under this license does not apply
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to any document created using the fonts or their derivatives.
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DEFINITIONS
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"Font Software" refers to the set of files released by the Copyright
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Holder(s) under this license and clearly marked as such. This may
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include source files, build scripts and documentation.
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"Reserved Font Name" refers to any names specified as such after the
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copyright statement(s).
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"Original Version" refers to the collection of Font Software components as
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distributed by the Copyright Holder(s).
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"Modified Version" refers to any derivative made by adding to, deleting,
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or substituting -- in part or in whole -- any of the components of the
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Original Version, by changing formats or by porting the Font Software to a
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new environment.
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"Author" refers to any designer, engineer, programmer, technical
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writer or other person who contributed to the Font Software.
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PERMISSION & CONDITIONS
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of the Font Software, to use, study, copy, merge, embed, modify,
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redistribute, and sell modified and unmodified copies of the Font
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Software, subject to the following conditions:
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1) Neither the Font Software nor any of its individual components,
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in Original or Modified Versions, may be sold by itself.
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2) Original or Modified Versions of the Font Software may be bundled,
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redistributed and/or sold with any software, provided that each copy
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contains the above copyright notice and this license. These can be
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included either as stand-alone text files, human-readable headers or
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in the appropriate machine-readable metadata fields within text or
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binary files as long as those fields can be easily viewed by the user.
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3) No Modified Version of the Font Software may use the Reserved Font
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Name(s) unless explicit written permission is granted by the corresponding
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Copyright Holder. This restriction only applies to the primary font name as
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presented to the users.
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4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
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Software shall not be used to promote, endorse or advertise any
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Modified Version, except to acknowledge the contribution(s) of the
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Copyright Holder(s) and the Author(s) or with their explicit written
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permission.
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5) The Font Software, modified or unmodified, in part or in whole,
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must be distributed entirely under this license, and must not be
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distributed under any other license. The requirement for fonts to
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remain under this license does not apply to any document created
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using the Font Software.
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TERMINATION
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This license becomes null and void if any of the above conditions are
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not met.
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DISCLAIMER
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THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
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OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
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COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
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DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
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OTHER DEALINGS IN THE FONT SOFTWARE.

‎examples/brand/Monda.ttf

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‎examples/brand/_brand.yml

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meta:
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name:
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full: "Retro Arcade Brand"
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short: "RetroArc"
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link:
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home: https://retroarc.example.com
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mastodon: https://mastodon.social/@retroarc
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github: https://github.com/retroarc
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linkedin: https://linkedin.com/company/retroarc
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twitter: https://twitter.com/retroarc
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facebook: https://facebook.com/retroarc
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# logo:
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# images:
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# icon-light: logos/retroarc-icon-light.png
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# icon-dark: logos/retroarc-icon-dark.png
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# wide-light: logos/retroarc-wide-light.png
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# wide-dark: logos/retroarc-wide-dark.png
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# tall-light: logos/retroarc-tall-light.png
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# tall-dark: logos/retroarc-tall-dark.png
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# small:
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# light: logos/retroarc-icon-light.png
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# dark: logos/retroarc-icon-dark.png
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# medium:
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# light: logos/retroarc-wide-light.png
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# dark: logos/retroarc-wide-dark.png
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# large:
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# light: logos/retroarc-tall-light.png
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# dark: logos/retroarc-tall-dark.png
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color:
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palette:
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pink: "#E83E8C"
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blue: "#007BFF"
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cyan: "#17A2B8"
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teal: "#20C997"
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green: "#28A745"
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yellow: "#FFD700"
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orange: "#FF7F50"
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red: "#FF3333"
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purple: "#6F42C1"
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indigo: "#6610F2"
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black: "#1A1A1A"
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white: "#F8F8F8"
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foreground: black
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background: white
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primary: purple
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success: green
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info: cyan
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warning: yellow
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danger: orange
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light: white
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dark: black
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typography:
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fonts:
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- family: Quantico
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source: google
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weight: [700]
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style: [normal, italic]
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display: swap
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- family: Monda
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source: file
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files:
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- path: Monda.ttf
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weight: 400..700
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- family: Share Tech Mono
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source: bunny
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weight: 400
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style: normal
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display: swap
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base:
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family: Monda
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size: 17px
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weight: 400
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line-height: 1.5
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headings:
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family: Quantico
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weight: 400
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line-height: 1.2
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style: normal
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monospace:
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family: Share Tech Mono
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size: 0.9em
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weight: 400
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monospace-inline:
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family: Share Tech Mono
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# size: 0.9em
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weight: 400
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color: yellow
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background-color: "#1a1a1add"
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monospace-block:
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family: Share Tech Mono
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size: 1.1em
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weight: 400
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color: green
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background-color: black
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line-height: 1.4
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link:
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weight: 400
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background-color: purple
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color: white
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decoration: "underline"
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defaults:
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bootstrap:
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defaults:
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my-pink: "$brand-pink"
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shiny:
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theme:
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preset: shiny
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rules: |
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.navbar-brand { color: $my-pink }
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# TODO: Find an appropriate theme variable to set
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# navbar-bg: $brand-purple

‎examples/brand/_colors.scss

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// https://github.com/twbs/bootstrap/blob/v5.3.3/site/assets/scss/_colors.scss
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.bd-blue-100 { color: color-contrast($blue-100); background-color: $blue-100; }
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.bd-blue-200 { color: color-contrast($blue-200); background-color: $blue-200; }
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.bd-blue-300 { color: color-contrast($blue-300); background-color: $blue-300; }
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.bd-blue-400 { color: color-contrast($blue-400); background-color: $blue-400; }
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.bd-blue-500 { color: color-contrast($blue-500); background-color: $blue-500; }
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.bd-blue-600 { color: color-contrast($blue-600); background-color: $blue-600; }
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.bd-blue-700 { color: color-contrast($blue-700); background-color: $blue-700; }
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.bd-blue-800 { color: color-contrast($blue-800); background-color: $blue-800; }
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.bd-blue-900 { color: color-contrast($blue-900); background-color: $blue-900; }
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.bd-indigo-100 { color: color-contrast($indigo-100); background-color: $indigo-100; }
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.bd-indigo-200 { color: color-contrast($indigo-200); background-color: $indigo-200; }
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.bd-indigo-300 { color: color-contrast($indigo-300); background-color: $indigo-300; }
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.bd-indigo-400 { color: color-contrast($indigo-400); background-color: $indigo-400; }
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.bd-indigo-500 { color: color-contrast($indigo-500); background-color: $indigo-500; }
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.bd-indigo-600 { color: color-contrast($indigo-600); background-color: $indigo-600; }
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.bd-indigo-700 { color: color-contrast($indigo-700); background-color: $indigo-700; }
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.bd-indigo-800 { color: color-contrast($indigo-800); background-color: $indigo-800; }
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.bd-indigo-900 { color: color-contrast($indigo-900); background-color: $indigo-900; }
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.bd-purple-100 { color: color-contrast($purple-100); background-color: $purple-100; }
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.bd-purple-200 { color: color-contrast($purple-200); background-color: $purple-200; }
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.bd-purple-300 { color: color-contrast($purple-300); background-color: $purple-300; }
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.bd-purple-400 { color: color-contrast($purple-400); background-color: $purple-400; }
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.bd-purple-500 { color: color-contrast($purple-500); background-color: $purple-500; }
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.bd-purple-600 { color: color-contrast($purple-600); background-color: $purple-600; }
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.bd-purple-700 { color: color-contrast($purple-700); background-color: $purple-700; }
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.bd-purple-800 { color: color-contrast($purple-800); background-color: $purple-800; }
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.bd-purple-900 { color: color-contrast($purple-900); background-color: $purple-900; }
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.bd-pink-100 { color: color-contrast($pink-100); background-color: $pink-100; }
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.bd-pink-200 { color: color-contrast($pink-200); background-color: $pink-200; }
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.bd-pink-300 { color: color-contrast($pink-300); background-color: $pink-300; }
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.bd-pink-400 { color: color-contrast($pink-400); background-color: $pink-400; }
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.bd-pink-500 { color: color-contrast($pink-500); background-color: $pink-500; }
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.bd-pink-600 { color: color-contrast($pink-600); background-color: $pink-600; }
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.bd-pink-700 { color: color-contrast($pink-700); background-color: $pink-700; }
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.bd-pink-800 { color: color-contrast($pink-800); background-color: $pink-800; }
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.bd-pink-900 { color: color-contrast($pink-900); background-color: $pink-900; }
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.bd-red-100 { color: color-contrast($red-100); background-color: $red-100; }
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.bd-red-200 { color: color-contrast($red-200); background-color: $red-200; }
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.bd-red-300 { color: color-contrast($red-300); background-color: $red-300; }
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.bd-red-400 { color: color-contrast($red-400); background-color: $red-400; }
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.bd-red-500 { color: color-contrast($red-500); background-color: $red-500; }
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.bd-red-600 { color: color-contrast($red-600); background-color: $red-600; }
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.bd-red-700 { color: color-contrast($red-700); background-color: $red-700; }
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.bd-red-800 { color: color-contrast($red-800); background-color: $red-800; }
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.bd-red-900 { color: color-contrast($red-900); background-color: $red-900; }
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.bd-orange-100 { color: color-contrast($orange-100); background-color: $orange-100; }
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.bd-orange-200 { color: color-contrast($orange-200); background-color: $orange-200; }
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.bd-orange-300 { color: color-contrast($orange-300); background-color: $orange-300; }
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.bd-orange-400 { color: color-contrast($orange-400); background-color: $orange-400; }
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.bd-orange-500 { color: color-contrast($orange-500); background-color: $orange-500; }
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.bd-orange-600 { color: color-contrast($orange-600); background-color: $orange-600; }
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.bd-orange-700 { color: color-contrast($orange-700); background-color: $orange-700; }
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.bd-orange-800 { color: color-contrast($orange-800); background-color: $orange-800; }
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.bd-orange-900 { color: color-contrast($orange-900); background-color: $orange-900; }
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.bd-yellow-100 { color: color-contrast($yellow-100); background-color: $yellow-100; }
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.bd-yellow-200 { color: color-contrast($yellow-200); background-color: $yellow-200; }
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.bd-yellow-300 { color: color-contrast($yellow-300); background-color: $yellow-300; }
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.bd-yellow-400 { color: color-contrast($yellow-400); background-color: $yellow-400; }
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.bd-yellow-500 { color: color-contrast($yellow-500); background-color: $yellow-500; }
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.bd-yellow-600 { color: color-contrast($yellow-600); background-color: $yellow-600; }
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.bd-yellow-700 { color: color-contrast($yellow-700); background-color: $yellow-700; }
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.bd-yellow-800 { color: color-contrast($yellow-800); background-color: $yellow-800; }
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.bd-yellow-900 { color: color-contrast($yellow-900); background-color: $yellow-900; }
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.bd-green-100 { color: color-contrast($green-100); background-color: $green-100; }
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.bd-green-200 { color: color-contrast($green-200); background-color: $green-200; }
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.bd-green-300 { color: color-contrast($green-300); background-color: $green-300; }
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.bd-green-400 { color: color-contrast($green-400); background-color: $green-400; }
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.bd-green-500 { color: color-contrast($green-500); background-color: $green-500; }
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.bd-green-600 { color: color-contrast($green-600); background-color: $green-600; }
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.bd-green-700 { color: color-contrast($green-700); background-color: $green-700; }
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.bd-green-800 { color: color-contrast($green-800); background-color: $green-800; }
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.bd-green-900 { color: color-contrast($green-900); background-color: $green-900; }
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.bd-teal-100 { color: color-contrast($teal-100); background-color: $teal-100; }
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.bd-teal-200 { color: color-contrast($teal-200); background-color: $teal-200; }
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.bd-teal-300 { color: color-contrast($teal-300); background-color: $teal-300; }
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.bd-teal-400 { color: color-contrast($teal-400); background-color: $teal-400; }
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.bd-teal-500 { color: color-contrast($teal-500); background-color: $teal-500; }
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.bd-teal-600 { color: color-contrast($teal-600); background-color: $teal-600; }
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.bd-teal-700 { color: color-contrast($teal-700); background-color: $teal-700; }
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.bd-teal-800 { color: color-contrast($teal-800); background-color: $teal-800; }
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.bd-teal-900 { color: color-contrast($teal-900); background-color: $teal-900; }
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.bd-cyan-100 { color: color-contrast($cyan-100); background-color: $cyan-100; }
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.bd-cyan-200 { color: color-contrast($cyan-200); background-color: $cyan-200; }
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.bd-cyan-300 { color: color-contrast($cyan-300); background-color: $cyan-300; }
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.bd-cyan-400 { color: color-contrast($cyan-400); background-color: $cyan-400; }
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.bd-cyan-500 { color: color-contrast($cyan-500); background-color: $cyan-500; }
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.bd-cyan-600 { color: color-contrast($cyan-600); background-color: $cyan-600; }
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.bd-cyan-700 { color: color-contrast($cyan-700); background-color: $cyan-700; }
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.bd-cyan-800 { color: color-contrast($cyan-800); background-color: $cyan-800; }
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.bd-cyan-900 { color: color-contrast($cyan-900); background-color: $cyan-900; }
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.bd-gray-100 { color: color-contrast($gray-100); background-color: $gray-100; }
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.bd-gray-200 { color: color-contrast($gray-200); background-color: $gray-200; }
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.bd-gray-300 { color: color-contrast($gray-300); background-color: $gray-300; }
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.bd-gray-400 { color: color-contrast($gray-400); background-color: $gray-400; }
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.bd-gray-500 { color: color-contrast($gray-500); background-color: $gray-500; }
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.bd-gray-600 { color: color-contrast($gray-600); background-color: $gray-600; }
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.bd-gray-700 { color: color-contrast($gray-700); background-color: $gray-700; }
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.bd-gray-800 { color: color-contrast($gray-800); background-color: $gray-800; }
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.bd-gray-900 { color: color-contrast($gray-900); background-color: $gray-900; }
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.bd-white { color: color-contrast($white); background-color: $white; border: 2px solid $body-color;}
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.bd-black { color: color-contrast($black); background-color: $black; }
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.bd-foreground { color: $body-bg; background-color: $body-color; }
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.bd-background { color: $body-color; background-color: $body-bg; border: 2px solid $body-color;}

‎examples/brand/app-express.py

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from shiny.express import input, render, ui
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ui.page_opts(theme=ui.Theme.from_brand(__file__))
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ui.input_slider("n", "N", 0, 100, 20)
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@render.code
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def txt():
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return f"n*2 is {input.n() * 2}"

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