Can someone how colors work in the realm of physics

For example, red happens to be every other color than red itself and is shown as red. Could someone further explain why this works?

Colors work in the sense that all colors mixed together cause white light. When the colors are together, or all present, it is white. Now, these colors can be split up. An object we see as blue, for example, adsorbs all the colors except blue. The object "rejects" blue and reflects is back into "space" We pick up on the blue being reflected back. Now, why this occurs; I think it is because of the frequency of the light. Kind of like how radios have frequencies. (Not for sure... I'm only a high school student)
Anyway, white light is the presences of all light. If an object reflects every frequency of color, they remain together, and make white light; which is what you would see. Black is the absence of all light. A black object adsorbs every color, leaving nothing to be reflected, so "nothing"- blackness- remains for us to see.