Dear developers, please add the ability to define a variable's color based on several other variables.
For example: let's say I've decided that the hover state is created using the rule "brand color + 50% opacity of the theme color" (white for the light theme and black for the dark theme). But then the client suddenly decides to change their brand color. It would be really convenient to be able to create rules like this, so that you don't have to change every color manually. It would save a lot of time.
