In daily life, we often ignore the color changes of some things around us due to the adaptability of our eyes. However, these changes can be faithfully recorded in your color photos by digital cameras or film in photography. If you don’t know enough about the laws of light and color changes, you can’t grasp the impact of these small color changes on imaging. The photos taken will be chaotic, seriously affecting the quality of the finished product. To be able to use colors better and shoot ideal work, you must understand some knowledge about colors.
The Foundation of Color (Three Primary Colors)
Primary colors are basic colors used to blend other colors. The primary colors have the highest color purity and the most vivid. The vast majority of colors can be blended out, while the other primary colors cannot be blended out. The three primary colors are divided into two categories, namely the three primary colors of light and the three primary colors of pigment.
Human eyes recognize colors based on the wavelength of light they see. Most of the colors in the spectrum above can be composed of three basic colors mixed in different proportions. The colors of these three basic colors are red, green, and blue. The three kinds of light are mixed in the same ratio and reach a certain intensity, and they appear white (white light); if the intensity of the three kinds of light is zero, it is black (dark). This is the principle of the additive color method. The principle of the additive color method was applied to early color photography and is now widely used in televisions, monitors, and other products that actively emit light.
When printing and painting, they passively emit light by the reflection of the surface, the color presented by the object is the remaining part of the light source after being absorbed by the pigment. Therefore, the principle of color formation is called the principle of the subtractive color method, and the principle of the subtractive color method is also widely used in various occasions of passive light emission. The three primary color pigments in the principle of the subtractive color method are Cyan, Magenta, and Yellow.
Application of Color
1) The Role of Filters
The three primary color wheels can be used in art and photography. For example, when shooting a blue or cyan sky, you can use a yellow or red filter to deepen up the color. In black and white photography, yellow-green filters can be used to lighten the approximate yellow-green objects. In a nutshell, filters of opposite colors can darken objects, while filters of similar colors can lighten objects.
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