Caesium is a monospaced, cursive typeface derived from Cascadia Code. While it inherits some of Cascadia’s structure, Caesium is more radical on the design.
Glyph categories vary.
- Lowercase letters: cursive with a 2° slant.
- Uppercase letters: roman with a 1° slant.
- Symbols and digits: upright.
This gives Caesium a rhythm, brings characters a script feel and makes them more legible.
Caesium’s default weight (Regular) is lighter than Cascadia’s; it matches more closely with other fonts. To replicate Cascadia’s original Regular, use Caesium Thick.
Caesium doesn’t fully adopt cursive forms. For example, ⟨a⟩ and ⟨g⟩ are two-storey (or 1.5-storey?), which gives letters unique shapes and improves the differentiation between similar characters.
The author is not a fan of coding ligatures, so Caesium doesn’t include them. However, for the consistency with digits, ⟨x⟩ and ⟨b⟩ turn into roman forms when part of integer literals.
- Enlarged, dot‑like punctuation.
- Curved commas and quotation marks.
- Dashed zeros (including super/subscripts).
- Adobe Latin 2.
- Adobe Greek 1.
- Box drawings.
- Block elements.
It’s recommended to use the original Cascadia for fallback of Latin/Cyrillic/Arabic characters, and 方正巴龙草书黑体 for Han.
Caesium is distributed under the SIL Open Font License 1.1. The names “Caesium” and “Cascadia” are reserved font names. See the LICENSE file for details.