Why Do People Dream in Color Even When They Sleep in Black and White?

Sometimes, even when you're watching black-and-white TV, your dreams are full of color. Imagine you’re eating a chocolate bar that tastes like fruit, it’s still chocolate, but it feels different in your mouth. Your brain works the same way. During sleep, your brain is active and can create colorful pictures, even if what you see during the day isn’t colored.

Your brain uses memory to build dreams. When you’re asleep, it doesn’t care about what you saw earlier, it just wants to make interesting stories with whatever it has on hand. If your brain remembers color from other times, like when you’re reading a colorful book or looking at bright pictures, those colors can show up in your dreams.

So even if you watch black-and-white TV all day, your brain might still decide to add some color into the mix, just because it wants your dream to be more fun!