I was telling my husband that I thought it would be neat if rain came down in colors, based on severity. So, when you want to talk to someone about how hard it was raining, you could describe it as yellow rain or pink rain, and they would know exactly what you meant. Or you could look out the window and know immediately where it's letting up or getting worse, just based on the colors in the distance.
"...I only wanted 2 see U laughing in the purple rain..."