Color gradient

In color science, a color gradient (also known as a color ramp or a color progression) specifies a range of position-dependent colors, usually used to fill a region.

In assigning colors to a set of values, a gradient is a continuous colormap, a type of color scheme. In computer graphics, the term swatch^[1] has come to mean a palette of active colors.

• real world color gradients or swatch books
• 
  RAL CLASSIC K5 color fan
• 
  Pantone color guide
• 
  cards of Pantone base colors and blends
• 
  HKS colour fan