When the eye sees a color it is immediately excited and it is its nature, spontaneously and of necessity, at once to produce another, which with the original color, comprehends the whole chromatic scale.
Goethe, Theory of Colors
COLOR PRINCIPLES
Hue, Intensity & Value
HUE
Hue is the base color for example, pure red or blue.
INTENSITY
Intensity (also called saturation) is the amount of color. The lower the saturation, the more gray the color is.
VALUE
Value (also called brightness or luma) is the whiteness of a color. A value of 0% would be black, while a value of 100% would be the pure color.
RGB COLOR MODEL
RED GREEN BLUE
INTRODUCTION
In the retina of the eye, there are three kinds of color receptors, called cone cells. The three kinds of cone cells are sensitive to the short, medium, and long wavelengths of visible light, respectively. The RGB color model approximates the way human vision encodes images by using three primary color channels: red, green, and blue. The RGB color model is additive, which means the red, green, and blue channels combine to create all the available colors in the system. When all three primary color values are the same, the result is neutral, or grayscale. For example, if all three primary colors are 0 percent, the result is black. If all three primary colors are 100 percent (the maximum value), the result is white. When all three primary color channels are nearly the same strength, the result appears neutral with a slight color cast, depending on which channel is the strongest. For example, if the value of the red channel is higher than the value of the blue and green channels, the result is a slightly red image. Secondary colors are combinations of two primary colors: red plus green is yellow, green plus blue is cyan, and blue plus red is magenta.
RYB COLOR MODEL
RED YELLOW BLUE
INTRODUCTION
It is a historical set of subtractive primary