Colors are included in light, so they can't exist without light. Light exists physically, colors don’t. Colors only exist in a mind of one who see them. Light is necessary for photography because we realize what kind of subject is there on a photograph by the light and shade of the photograph therefore, it’s definite to say that photographs without colors are still photographs. Then, how about the opposite? If there were only colors, no light and shade in a photograph, would you say it's a photograph? To answer the question, I created new images by mapping the color spectrum on the light and shade of photographs.