How do you feel about changing the background color of ::selection?
It's a minor change, but it could make Kiwifarms look a bit more customized. I believe at some point the value chosen was #69a35d, which could be used for the dark-green/default theme, but maybe another ones can be used for the Kawaii and Spooky Orange styles.
just my opinion but i find the text to be a bit easier to read with the current selection color rather than the greenish one in your example. but it isnt bad, i can still read it, just easier with the current selection.
How about these ones then?
By the way, people can also suggest colors if they want, you can just go to any Hex-color tool generator, pick the one you want, then you can enter the value here for checking its accessibility for a website: https://webaim.org/resources/contrastchecker/
This one could be for the default, but if you want another one please share.
It's #206537