Aaaaaand I failed miserably. Apparently just changing the colors in the .cs file doesn't work. That's what you get for being overconfident and rushing in without studying modding theory.
Still doesn't work. Perhaps I'm doing something wrong when building the mod. Nevermind then, I think I'm getting used to those colors.
Thanks for the help though.
I just wanted to say that. ^^A little suggestion. Maybe Additional line in tooltips wich will tell what mod adds the item?