Why do some colors look warm and others cool?

Close your eyes and picture a crackling campfire — oranges and reds dancing in the dark. Now imagine a frozen lake under pale winter light — blues and silvers stretching forever. You didn't feel actual heat or cold, but your brain whispered "warm" for one and "cool" for the other. Why does color carry temperature when color is just light bouncing around?
Here's the physics part: color has no temperature. A red laser and a blue laser can both be room temperature, both just photons zipping through space. The "warmth" you feel is happening in your brain, not in the light itself. Your mind is reading color as a clue and making a guess about the world.
