No one wants glowing rainbow cycling colors for their water? Or plants? Or terrain? Or use them all and get an LSD induced fever dream of color! More seriously, it could be kind of interesting to be able to tint the color of water in POTs.
Yeah, Port can make few bucks here. To change the color you need - water City lot, water station(new city house from Coto shop), and a significant amount of DYEs(no blood color) per week to operate. I think it could be cool from any side (players and devs) Devs for sure already have a tech to change water color (see blood one water in NBM) and for guys who bought blood bundle times ago - no dyes for water station operation and any color forever.
You just know someone will use glowing green dye, and put down some of those igloo shaped "sky navy" house things on the lot. Yes, you too can have your very own superfund site!
As long as they keep basic colors it is fine....but i say NO to rainbow, cycling and etheral colors. I dont need my bay glowing like and aether...that would not look good at all