"Best" default colour space

CSS has a lot of different ways to define colours. Hex codes, rgb, hsl, hwb, (ok)lab, and (ok)lch. What's your preferred default way to declare colours in your CSS files and why?

I've read Kevin's pragmatic guide to modern CSS colours (both part one and part two) and it seems he defaults to hsl:
I was very excited about LCH coming to CSS, but I’ve found myself sticking to hsl() for a lot of things because of the variable upper limit of the Chroma value, and the strange shifts that can happen.
-Part Two

So I'm thinking that I should start there, but wanted to see what other people use and why. Super curious, thanks in advance!
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