Similar CSS Color Finder
Update: Expanded CSS Level 4 and HDR color support added.
It would seem that very similar but non-identical colors like to pop up in CSS files of any reasonable age, and I became annoyed by them. This started as a little script to help me find them in a stylesheet, and grew into this full-fledged tool.
This tool will scan CSS and CSS-like files like Sass, Less, etc and find colors similar to each other within a set tolerance.
This handles named colors, rgb(), rgba(), hsl(), hsla(), hwb(), lab(), lch(), oklab(), oklch(), and color() functions as well as CSS Color Level 4 wide-gamut spaces including Display P3, Rec2020, and ProPhoto RGB.
There is a command line version of this with Continuous Integration support available on GitHub.
You are real wizard!