>>1502082If you're on 4chan you can select from the Styles to find a nice color. I like Yotsuba B. For a more general solution (and so you don't write a custom script for each individual site), you'll probably gonna wanna use a browser plugin.
There are lots of these plugins, but not every one of them works on every site. For Chrome-based browsers I found this one:
https://github.com/hoishing/chrome-change-background-color Click the Download link to go to the Chrome store and install it. Pic related.
