Was talking to someone about CSS Nostalgia and "back in my day" when scrollbar colors came up.
/* For Chromium based browsers */ ::-webkit-scrollbar { background: #2A365F; } ::-webkit-scrollbar-thumb { background: #514763; } /* For Firefox */ html { scrollbar-color: #514763 #2A365F; }
Firefox and Chrome have different selectors, so in order to support the majority of browsers, you need both.

Chrome with a blue/purple scrollbar

Safari with a blue/purple scrollbar

Firefox with a blue/purple scrollbar