Color tone

Now The thought wavelength was more convenient for research light properties . we had visible Spectrum formed a circuit. And divide into nine area (please see picture 1), also call color ring.

The number on color means wavelength of color corresponding , the unit as nm, any two type fan color at the top of color top are each other’s complementary color . blue （ 435 ～ 480nm ） complementary color is yellow （ 580 ～ 595nm ）。In other words: Yellow: Minus-blue subtractive primary used in the three-color process. By studying the color tone has other characters as follows:

*We can get white color through mixed complementary color: for example mixed blue color and yellow color we get white, mixed yellow color and cyan color we also can get white;

*Whatever sort color on color ring you can mixed the color with the adjacent two kind color.

*The sun shines on an object . some wavelength is absorption by object. We have seen The color of object(reflect light) is complementary of Color tone .