Graduated Color Map

A map on which a color gradient indicates a progression of numeric values. For example, increases in population density might be represented by the increased saturation of a single color (light to dark), or temperature differences by a sequence of colors ranging from blue to red.

In the image below, graduated colors based on a color gradient ranging from light yellow to brown are used to show the price per unit population paid for FCC Cellular Market Area licenses. Darker areas indicate a higher price per unit.