How Do We Know We All See The Same Colors?

We all see the same colors because our brains agree on what each color means, even though our eyes might send slightly different messages.

Imagine you and your friend both look at a red apple. Your eyes catch the light from the apple, and they each send their own message to your brain, like two kids telling their mom about the same toy but using different words. But your brain knows what "red" feels like because it’s been learning since you were little. It compares the message it gets with all the other messages it has seen before. If it sees something that looks and acts like red, it says, "That's red!"

When we’re babies, our brains are like sponges, they soak up everything around us. We learn what "blue" is by seeing the sky or a blue toy, and we remember it because we connect it with things we know. As we grow, our brain keeps matching new colors to ones we already know.

Even if two people see a color slightly differently, their brains still recognize it as the same color, like how two friends might describe a funny joke in different ways but both laugh at it. That’s how we all agree on what "green" or "yellow" means!