Glossary for Geospatial Science

64 standard annotation colors:  In 8-bit contexts the Color Palette Editor window normally reserves the first 64 colors for a standard set of user annotation colors for text, overlays and patterns.  That leaves 192 colors for the image itself — ample color space for representing most natural color images to the human eye.  The 64 standard colors are chosen at fixed intervals in the RGB color model.  They generally appear brighter and purer than the subdued natural tones of the underlying image.