XF 2.1 Change the colorful avatars

[stanleyb23]

I d like to change the colorful avatars and use more shades. I cant remember if I had an option during the migration of my old forum.
If I look to other forums I see other colors then mine. Is it theme related?

 

[stanleyb23]

For example the xenforo website doesnt have the yellow and the orange avatars. I dont understand why that is different with my website. (x ui theme),

Thanks in advance!