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(MODEL (HLS|RGB)) |
(VALUE index | (Black|Blue|Cyan|Green|Magenta|Red|White|Yellow))
Select color parameters. The MODEL option selects either the HLS (Hue
- Lightness - Saturation) or RGB (Red - Green - Blue) color model. The
INDEX option redefines an entry in the color lookup table. The index
selected must be in the range 8 .. 255, since lookup table entries 0 ..
7 correspond to the 8 predefined named colors. The triple of values
(v1,v2,v3) defines the (H,L,S) or (R,G,B) fractions (in range 0.0 ..
1.0), depending on the color model currently selected. The VALUE
option selects a color for further plotting, either by lookup table
index (range 0 .. 255) or by the name of one of the predefined colors.