I have made an eye color retexture pack with normal pupils based on the main color of each customization item.
As the beast and snake eyes were both blue, I decided to make the snake eyes green. Works on every character.
These are the changes:
Beast Eyes - Blue
Snake Eyes - Green
Sunflower Eyes - Yellow
Cyber Eyes - Cyan
Galaxy Eyes - Purple
Mishima Zaibatsu Eyes - Red
If you don't want to lose an eye color mod because of this mod due to compatibility problems, prioritize the mod by renaming the folder to be the first one alphabetically like this (for example)
*Not gonna modify this mod changing color slots, it's a mod I made for my own use and I thought it would be cool to share it.