I think people see colors the same way because we all have the same biology. For example, dogs (or many other predators) see the world in black and white because this way they can better see the moving objects they are hunting. Well, people have different needs - we need to understand colors in order to pick fruits (fruits/vegetables/berries, etc., which are all different colors, so as not to be confused with poisonous ones).

In general, as far as I understand, color is just a reflection of sunlight (or other light source). I was very surprised when I learned that the color of an object depends simply on the structure of the surface from which the light is reflected. It turns out that a color is just an uneven surface of a certain type