Okay kiddo, you know how some things can be different colors like your crayons or your clothes? Well, on a computer or a TV screen, there are tiny little dots called pixels that can be different colors too!
But how do we tell the computer or TV what color to make the pixels? That's where RGB color spaces come in.
Think of RGB like three different crayons that mix together to make different colors. "R" stands for red, "G" stands for green, and "B" stands for blue. When we want to make a certain color on the screen, we use different amounts of each of these three colors to create it.
For example, if we want the color purple, we mix together a lot of red and a lot of blue, but very little green. Or, if we want a light blue color, we mix together a lot of blue and a little bit of green.
Different devices and screens use different RGB color spaces, which means they might have different ways of creating the same colors. It's important for designers and photographers to know which RGB color space is being used so that their work looks the same on every device!
So, that's RGB in a nutshell - it's like mixing different colors of paint or crayons to make all the different colors you see on the computer or TV screen.