Specify a color for different kind of features.
Examples of COLOR_FEATURES flag usage:
COLOR_FEATURES_01=thread=131,170,214 COLOR_FEATURES_02=hole=0,0,255 COLOR_FEATURES_03=pad=255,0,0 COLOR_FEATURES_04=shaft=0,255,0 COLOR_FEATURES_05=groove=255,255,0 COLOR_FEATURES_06=pocket=255,255,0 COLOR_FEATURES_07=pattern=255,0,255 COLOR_FEATURES_08=sweep=0,255,255 COLOR_FEATURES_09=draft=255,0,0