[Silhouette]

Have you never implemented a design yourself, and then found that when you looked at the results as a whole, it didn't work quite as well as you hoped from the original concept work?

Have you never A/B tested a site and found that varying colours made a difference?

Have you never developed a site with some colour scheme and later found you needed to extend the colour scheme, perhaps to incorporate a new product or service being added to the available range?

Having a colour scheme that is set in stone early on sounds like one of those idealised things that sometimes just doesn't work in the face of reality.

[anotheryou]

I agree!

I'm currently building something that has mild themes for fonts, colors and some margins (and is build on top of a SCSS framework, but that wasn't my choice), without color variables it would be a pain...