How Animals Hacked The Rainbow And Got Stumped On Blue

Until about 600 million years ago, seeing colors didn't matter so much to Earth's inhabitants - nobody had eyes. Simple animals back then just floated around. They were aware of sunlight, but didn't have any of the biological bits and pieces needed to perceive color. Then, something really big happened.
A predator that could swim quickly evolved vision. That predator probably looked something like a big shrimp, and now it had eyeballs. That's when color kicked off.