CSS Variable-based Theme

[Haeleon]

Currently, several parts of the UI have hard-coded colors. To make theming easier and keep future elements consistent, a set of CSS variables should be used to control base colors and potentially control how they mix. For example, the background and accent colors could be directly changed, and all UI parts without specifically chosen colors would change to match.

[kilbouri]

I wonder if this could hook into Tailwind using a theme extension that defines new theme colours using var()...