Quick idea— Idk if this is good or not but the ability to make custom colored katana handles, by having different color flowers you can find around the map, mainly in the bandit camp areas. Then you can take a flower and use the pigment or whatever to color leather straps, then putting the colored leather straps on a empty katana handle to give it the usual red one but a different color obviously— idk where I thought of this but I decided to pitch it only for the hell of it. To with it what you will. 🤷☕️

Running off the idea of being able to color leather, you could use the pigments to simply customize things like bags as well, or even rope. Which could give a lil more customization to bows and other things that require rope.