Hey, thanks for making this! I've struggled with setting up User CSS in the past, maybe I'll try in a bit. But I'm curious, have you used an a11y tool to ensure the contrast meets WCAG compliance? It's a great way to catch any minor mistakes. I'm happy to help, Accessibility Insights for Web is my favorite tool. I should mention I work for Microsoft, and they publish that tool, but you're welcome to shop around :)