Works great for me, although I thought it'd be implemented more like the aforementioned cumRGB mod. Nothing wrong with it being implemented this way, but I did find an issue tho. At first I thought it was having trouble displaying purple colors, but I found the G and B sliders are reversed. The green slider turns it blue and the blue slider turns it green. Red works as intended tho.
If I don't find any other big issues I'm gonna have a butt-ton of charcodes to update. Btw, I believe the default tongue color is 205,116,116, if anyone else using this wants to keep the default color for certain characters.
Thinking about it before clicking post... The issue may have happened by accidentally swapping G and B in the slider registration. I know next to nothing about making mods but I do understand those 2 colors are easy to get in the wrong order. Most people think of red blue green, but the game has it as red green blue. I often get them mixed up during dialogue writing, then I wonder why the settings are screwing up.
Tongue Colors Experiment