I color it to go with the mood. I usually keep it similar colors to the existing background to indicate that its a sort of background ambient noise. I use contrast to let the audience know if its a noticeable noise to the characters and other things like if its hot or cold etc.

Theres no rules tho

Turns out I never assigned this character within my Zenn headworld. Time to make executive decisions!

This is Mozkoth. I have thoughts for what they do already but going to wait until it's more fleshed out before I blurb.

One of the last study-dumps I did of my species the Zenn. Still pretty accurate for how old it is. Since then they've only become more diverse in body types.