(Reposting my comment from Lobsters)

Yeah, the LCH color space is much more useful than HSL. I wish more software had color pickers that supported it.

Another useful color space, closely related to LCH, is HSLuv (https://www.hsluv.org/). Its only difference is that instead of an absolute chroma (colorfulness) component, it has a relative saturation component, scaled so that 100% saturation means the maximum possible chroma sRGB allows for that hue and lightness.

HSLuv’s relative saturation makes it ideal for generating colors for today’s sRGB-restricted CSS, because its colors are always displayable, no matter their saturation value. This avoids LCH’s problem where a color with too high a chroma value must be rounded to the nearest displayable color. The downside of relative saturation is that two different colors with the same saturation value might not look equally colorful.

HSLuv has a comparison page (https://www.hsluv.org/comparison/) that compares HSLuv, CIELUV LCh, and other color models. The charts do a good job of helping you understand how each color model works.

The home page for HSLuv also has a nice color picker that I sometimes use instead of the color picker built into various graphics software. It’s good to learn of the article author’s LCH Colour picker at https://css.land/lch/ – that’s a much easier-to-use LCH color picker than the other one I’ve seen, http://davidjohnstone.net/pages/lch-lab-colour-gradient-pick.... But something I prefer about HSLuv’s color picker is that the sliders’ colors show the final color you will get if you move that slider to that position, whereas the article author’s LCH Colour picker seems to do some weird hybrid of that behavior and making the sliders always show the same colors.