HSL variables system for automatic relative shades and transparency

[StrangeTech]

@yankiara

I really wish we could easily and dynamically derivate shades and transparencies from base colors.

I agree:

Add support for colour variations

Adding global colours is very smooth and elegant with Cwicly and has improved significantly. There is one aspect that is missing, which is built-in support for colour variations for a chosen global colour. Often designers we work with will express colours in a spectrum (e.g. Red100, Red200, …, Red900). Adding these as individual global colours is not feasible from a UX standpoint. Having the ability to add a base colour and automatically create variations for it that you can select from the …