Describir: Hue sensibility to dominant wave lenght chance the relation between saturation and colorimetric purity

  _  _    __   __    _  __     ___     ______     ______   __   __     ___    
 | \| ||  \ \\/ //  | |/ //   / _ \\  |      \\  /_   _//  \ \\/ //   / _ \\  
 |  ' ||   \ ` //   | ' //   | / \ || |  --  //   -| ||-    \   //   / //\ \\ 
 | .  ||    | ||    | . \\   | \_/ || |  --  \\   _| ||_    / . \\  |  ___  ||
 |_|\_||    |_||    |_|\_\\   \___//  |______//  /_____//  /_//\_\\ |_||  |_||
 `-` -`     `-`'    `-` --`   `---`   `------`   `-----`   `-`  --` `-`   `-`