Hello, I often find myself having trouble to find correct tab. I am not going to write stories about it, I think you will understand right from the image
Here is my suggestion:
(I also increased contrast of original icon, on purpose. Green tabs are pure functions.)
This is can be part of similar request about color coded main tab: https://github.com/EpicGames/UnrealEngine/pull/3122
which included these changes:
Please, can somebody from Epic look at it ? Even when it will mean accepting just original PR.