First time using color space other than RGB.

I'm implementing a cli based search function, where I need hightlight the keyword in the result.

I noticed there are several colors are really dark under RGB color space. I don't want hand pick any color palette since I'm bad at doing that. But this will result in a very unpleasant visualization.

Then I remembered OkLab, I randomly know that from the Internet, give it a try and it's amazing. But with `l` controling the brightness, with other two parameters called `a` and `b`, which control the green-red and blue-yellow, to me, totally nonsense. It's not a intuitive way to generate color.

With some unsatisfactory, I found OkLch, which I have no idea what it is. But hey, it can control brightness, chroma and hue. That's what I need exactly! I need random color to distinguish different keywords, but I want all keywords looks equal. With fixed brightness and chroma, I can select whatever hue I want!