[h-c-c]

Fun puzzle! Fyi, does not play well with Brave - experimantal dark mode.

But I think that's probably true of a lot of chess sites. I sort of feel like sites should have a way of flagging themselves as already in dark mode, so that they can be ignored by any dark mode extensions.

[neuronflux]

I think that this solution is a bit backwards. I think it should be on the extension to detect if the site is already "dark".