Change color variables names

[tusbar]

Remove color names from the variables names so they can be any colors.

@Shedna what do you think?

I thought about using bootstrap variable names (brand-primary, brand-warning, etc.) but they don’t have a variable for everything.

So it’s probably better to have our own configuration, then map everything to bootstrap.

[Shedna]

Seems legit, that's a good idea. Good bye gg-blue, you'll remain in our hearts :D