[zzzcpan]

The article is about subjective design choices. Any color space is fine for that as it's only used to pick colors.

Generally, though, what to use working with colors greatly depends on what you are doing and I'm pretty sure most of the time where you think you need CIELAB, HSL with luma for Lightness would do just fine, heck, even jpeg's native YCbCr or RGB might do. It's just not a good advice to avoid RGB or HSL simply because it doesn't work well on rather rare occasions.

[xelxebar]

Well, for the most part, the color space we're accessing is the exact same, so you can always use whatever space you please. The biggest problem with things like RGB is that color selection ends up turning into a horrible mess of seemingly unrelated magic numbers.