I like to play a mostly-vanilla game, and I'm using pouches and backpacks to organize my stuff. But it's annoying to remember which backpack is potions vs scrolls or whatever. I tried dyeing a backpack in-game, but it wasn't supported.
I feel like it should be! I'd like to be able to tell these bags apart!
I don't have bg3 modding experience and I feel like this would be a sort of ambitious thing to start with (idk how the dyes are coded and if they're like, armor-specific or character-rendering-specific, and I know the icons usually don't reflect dye color anyway), but I'd be happy to help with textures if this is something someone else wants to take on -- making icons/textures for all the dye colors / bag types would probably take a while, but being able to quickly pass the "Green pouch" of poisons between players would be super handy.