Colorable Water!

Figuring you can dye the water inside cauldrons, why don’t we have the ability to dye water outside of the cauldron? Certain biomes like swamps already have a different water color so why not be able to change that to any color you want. Having the ability to dye water would allow builders make such ideas as radioactive water if dyed lime green or maybe a cute pink colored river for your zoo of axolotls. As a builder myself this would provide me and others the ability create better maps and create an entirely new idea when building these maps or creations or whatever you want to use it for. Just think about it, a bright red waterfall for your purple planet? Or maybe even black to darken other blocks beneath it. Please take this idea into consideration Mojang, it would mean a lot to the community. -O.S