When the “absolute”, “atman”, comes into the physical world, depending on what form it wants to acquire, it forms a “qualitative state” around itself. Color is what is the “invisible” cause.
For example, in order for the buds to bloom on the trees, the ice melted, it is necessary to have a “qualitative state” of spring, an “invisible spring” that permeates everything around, and only then will it be
realized in the form of “birds singing”, “flowering trees”, etc. This is the “sensation” itself.