Hmm, that's weird. I had stress-tested the color options as much as I could. Even now, when I enter gibberish in the text field, it just doesn't do anything as the CSS is invalid. No reason the app should crash.

But anyway, I'll try to add some validation across the app so that this doesn't happen again. For now, to fix any issues at all, you only need to clear your local storage of the site. Here's how you can clear Local Storage on Chrome (https://www.leadshook.com/help/how-to-clear-local-storage-in...), similar steps for other browsers too.

Please let me know if that resolved the issue temporarily for you.