What is the principle of color photography?

At the beginning of the 20th century, the French physicist Lippmann invented color photography, so he won the 1908 Nobel Prize in physics. However, practical color photography didn't develop until 1930s. People developed the film for three times, and deposited red, green and blue dyes on the film respectively, so that every point in the color photo is composed of red, green and blue in a certain proportion. After seeing the colors of these combinations, the human eye can feel all colors from red to purple. In the 1950s, scientists invented a new color photography method, which combined the green light and red light obtained through a filter or two other suitable colors to form a full-color image, and developed it automatically by adding a photosensitive agent to the film.