Focus rings with nested contrast-color()?

As I was playing around with contrast-color(), I got a wild idea that you could use contrast-color() to invert its return value by nesting it: contrast-color(contrast-color(var(--some-color)). When would this be useful? Uh… Good question. I couldn’t come up with an example right away but after a bit I found one sitting right under my nose….

daverupert.com · daverupert.com