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|hue|Hue|False
ParameterRaster|intensity|Intensity|False
ParameterRaster|saturation|Saturation|False
ParameterBoolean|-n|Respect NULL values while drawing|False
OutputRaster|red|Red
OutputRaster|green|Green
OutputRaster|blue|Blue