Just know them no. Able to sanity check that an RGB value is the color it's supposed to be yes sometimes. It's not the most useful skill because you almost always get a swatch now, but sometimes being able to have some idea of how it'll look (should it be dark or light, grey or intense color) saves me 10 seconds here and there.

I like playing guess-RGB games every now and then because it improves the skill, but at the same time I find them really stressful haha.