Color
Codes
Color associations are easy to use for orientation when colors are used as a systematic
code to label the major
subdivisions of the information hierarchy.
base color choices on the 
triadic system of
color harmony
select hues with relatively high chroma
use medium levels of brightness
Color Schemes.
| The code must be applied consistently. It is likely to be learned and retained better if the colors used to establish a code are applied to more than one element of each display. For example, in the diagram, color is applied to the primary headings, buttons, borders and other elements to help users recognize that color is being used to affiliate groups of nodes. |  |
to Orientation