1. Three primary colors:

Such colors cannot be obtained by mixing other colors, but they can produce various other colors when combined with each other.

Red, yellow, cyan (blue and cyan have similar wavelengths)

red+yellow→orange

yellow+cyan→green

red+cyan→purple

Red, yellow and cyan mixed into black

2. Intermediate color:

The color obtained by mixing two colors is called secondary color (secondary color), which contains two primary colors.

3. Complex color (three colors, and then secondary colors):

The color obtained by mixing secondary color and secondary color or secondary color and primary color is called complex color.

When toning, we must master the nature of complex colors, and try to avoid the mixing of multiple colors, especially the blending of complementary colors.

4. Complementary color:

Special effects for color mixing. Two primary colors can be adjusted to form a secondary color, and the secondary color and the other primary color are called "complementary colors".

Complementary colors are peculiar colors that, when juxtaposed, they both accentuate each other's sharpness to the greatest extent possible, but when they are mixed with each other, the color changes from extremely sharp to grayish black.

5. Decolorization:

Adding black and white can significantly reduce the brightness and purity of the color, and make the hue of the original color subtract, change, or even disappear.