ColorPlane-class        ColorPlane
ConstantColorPlane-class
                        ConstantColorPlane
DiscreteColorPlane-class
                        DiscreteColorPlane
HexColorPlane-class     HexColorPlane
IntensityColorPlane-class
                        IntensityColorPlane
RGBColorPlane-class     RGBColorPlane
alpha_channel           alpha_channel
as_hexcol               convert to hex colors
as_rgb                  convert to rgb colors
blend_colors            blend two color planes
col2hex                 convert color name to hex character string
map_colors              map data values to a set of colors
rgb2hex                 convert rgb colors to hex colors
