What is the function of complementary color in art?

Three primary colors: red, green and blue R, G and B, and three complementary colors: cyan, magenta and yellow C, M and Y.

The so-called complementary color of one primary color is the sum color of the other two primary colors. Among the three primary colors, the sum of red and green is yellow, the sum of green and blue is blue, and the sum of red and blue is product.

Black and white film pays attention to the exposure accuracy, density and layering of photos. In addition to the above elements, color reproduction, color saturation and the expression of creative ideas to be reflected in color photos are also extremely important.

From the effect of film development, the color of color photos is influenced by the characteristics of lens selection, film selection, exposure accuracy, illumination angle and other factors, but for a photographer with basic experience, if the above factors have been selected, I feel that there is not much room for adjustment. Then, for photographers who are not strong in economic strength, they can't always go to professional print shops to print films. Ordinary color print spots may have color cast.

Those films are all off-color when they are shot in the color expansion shop and can be adjusted. According to my experience, taking portraits mainly depends on how the skin color in the photos is restored; The photos of architecture and the integration of people and architecture mainly focus on the color reduction of building materials (if there are many pavements, look at the color reduction of pavements); Landscape photos, it's hard to say, usually have green plants, depending on the color reduction of plants.

If there is a color cast, you can ask the color expansion shop to retype it. Here are some ways to adjust the color.

Yellowing: reduce yellowing

Redness, quality: increase cyan (the complementary color of red) and reduce quality.

Purple: (more blue, less red) add yellow and subtract product.

Partial green: additional products

The above color cast is a common problem in most photos. Generally speaking, the adjustment of color cast in photos is also based on the principle of three primary colors and three complementary colors. Of course, we don't need to worry about color adjustment when taking photos. I nag a few more words, because this question is related to my topic. Besides, in case you meet a poor photographer, can't you also instruct him? )

Density and gradation of photos. When you go to a color film shop to shoot a film, you must make it clear to the producer. People like us like to ask for higher density when we go to the color expansion shop to shoot films, so that the photos taken will have a sense of layering and color thickness, while the photos taken by ordinary people don't have high requirements for layering. On the contrary, they prefer bright and clear faces. In this case, if you don't talk to the filmmaker in advance, it will be difficult for the filmmaker to master it. In this case, if the density and level can't meet your requirements, it will be difficult to ask others to give it to you.

Reverse film, if developed by E-6 process, will come out as positive film. If developed by C-4 1 process (reverse negative development), the color of the film is the complementary color of the positive color film. If the film is shot on photographic paper, the color will be very thick and gorgeous, and of course there will be a lot of color cast, so it will be very difficult to adjust the color cast. Generally, this development method is applied to portrait photos, and the principle of adjustment is to fully lean on people's faces, which will have a very special effect.