Older operators need higher brightness levels to distinguish colors. Colors change in appearance as the ambient light level changes. The magnitude of a detectable change in color varies across the spectrum. It is difficult to focus upon edges created by color alone. Avoid red and green in the periphery of large displays.
Opponent colors go well together.
For color-deficient observers, avoid single color distinctions. Return to beginning of document Main Color page HyperGraph Table of Contents. HyperGraph Home page.