r.his
r.his - Generates red, green and blue raster layers combining hue, intensity and saturation (HIS) values from user-specified input raster layers.
Raster (r.*)
ParameterRaster|h_map|Hue|False
ParameterRaster|i_map|Intensity|False
ParameterRaster|s_map|Saturation|False
ParameterBoolean|-n|Respect NULL values while drawing|False
OutputRaster|r_map|Red
OutputRaster|g_map|Green
OutputRaster|b_map|Blue