Colors and highlights as a function of currently selected colorscheme variant palette

[anjos]

This theme has the ability to have its colours fine-tuned during setup:

setup({
   colors = {
      bg = "#000000",
      green = "require('onedarkpro.helpers').darken('green', 3, 'onedark')'
      ...
   }})

I wonder what happens if the declaration would be as such:

setup({
   colors = {
      bg = "#000000",
      green = "require('onedarkpro.helpers').darken('green', 3)'  # no colorscheme selected?
      ...
   }})

From the readme, it looks like the colorscheme currently selected when the plugin loads will impact the setting on green, and any subsequent call to, e.g. vim.cmd("colorscheme onelight"), would not change this. Or am I reading this wrong?

Somehow, Cappuccin implements this a bit differently, allowing the user to pass a function for defining highlights (or colors for this matter), in which the input argument is the currently selected palette. This creates an opportunity for the user to dynamically change the colors appropriately as other colorschemes are selected. I'd like to achieve the same effect here w/o having to define all possible colorscheme variants at setup() time. How to best achieve this?