This is a large part of why I love SASS. I frequently work with a base color + some combination of lighten/darken/saturate/desaturate/opacify/transparentize for

This is a large part of why I love SASS. I frequently work with a base color + some combination of lighten/darken/saturate/desaturate/opacify/transparentize for a given widget or whatnot. Changing the entire widget is as easy as changing the base color. It makes tweaking and theming super easy. It's a lot easier when you think of colors as derivatives of a base color, rather than a collection of 7 different colors that have to be kept in sync.