Have you thought that dishwashers only have different colors for aesthetic reasons?
It is not that simple, and choosing the wrong fungus can risk damaging the object you are trying to clean.
It has probably been the one who has rubbed a green dishwasher against a stainless steel surface or oiled wooden bench marked, to name an example.
The different colors of disk sponges indicate how coarse they are and what surfaces they are suitable for.
But what disk sponge should you use for what?