what's the tag for abstract background?

So I was tagging post #986943 and could not find the correct tag for that kind of background. Help would be appreciated.

I saw tag list:image composition now, but I don't think any of the backgrounds listed there fit the post you mentioned.

We don't have abstract background. But we have red background and don't have yellow background either, which surprises me.

Danielx21 said: We don't have abstract background.

We could start using it I guess.

But we have red background and don't have yellow background either, which surprises me.

Color tags aren't really done in any systematic way because there are so many colors, it's mostly just someone thinking "hey I see a lot with the color, let me tag it". We don't have a list of "core colors" we allow in tag variations or anything.