i haven't been running it so i don't know what colours you mean. Might not help i have ublock on Firefox too so many of the connections just don't happen, and I don't use Firefox a lot. I will use it a bit and see if I can see any colours apart from icons of the sites the boxes represent.
I have Opera, Chrome, Firefox, and Edge installed, i only really use two of them at most but which two varies. edge is most ignored out of all, I haven't loaded Opera in a few months, so mainly use chrome and some Firefox. I use an irc chat channel sometimes and edge won't let me copy/paste into the client so it fails. Firefox is currently best at it but for a while Opera was better.
I have 4k monitor so can have chrome open in right hand of screen...