Pico CSS v2 comes with 380 manually crafted colors
picocss.com
picocss.com
All the lesser known ones tend to not be very extensible or themable beyond basic color changes, and they're a little too extreme about pure semantic HTML.
This guy has a really good roundup with last commit and GitHub stars info:
https://github.com/dbohdan/classless-css
Currently working on getting some issues with their test case ironed out to get mine (https://eternityforest.github.io/barrel.css/) included.
I am coming to prefer lch(…) to any library. It scratches that consistent color itch and has basically universal support now in browsers. Then again, I prefer setting my CSS values through CSS variables rather than setting visual styles in the markup. YMMV
It looks like oklch() fixed a problem I noticed with blue-white gradients turning purple~
For for complex grids, PicoCSS suggests complementing with:
1. Flexbox grid layouts (for a quick way to prototype or build a complex layout)
- Bootstrap grid, Flexbox Grid
2. OR CSS Grid Generators (for a light and custom grid)
- CSS Grid Generator, Layoutit!, Griddy
3. OR just use CSS Grid
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There are links to all the above in the link below: