In the 3613 patchlog, it claimed that gamecolors was changed to "better colors". However, the person who did this didn't notice that seraphim's colors are still hardlocked because of shaders.
I made a custom lua to address this a while back. It matches the colors to the hardlocked seraphim color.
viewtopic.php?f=2&t=350&hilit=gamecolors
Cheers