Say each of the color questions aloud to yourself and then answer the final question. I'll post the answer in comments if someone doesn't beat me to it.
What color are polar bears?
What color is cotton?
What color are clouds normally on a sunny day?
What color are marshmallows?
So what do cows drink _________?
Many of the jokes are contributions from our users. If you find anything offensive and against our policy please report it here with a link to the page. We will do everything to make this an enjoyable platform for everyone.