Colormaps

    hsv        - Hue-saturation-value color map.
    hot        - Black-red-yellow-white color map.
    gray       - Linear gray-scale color map.
    bone       - Gray-scale with tinge of blue color map.
    copper     - Linear copper-tone color map.
    pink       - Pastel shades of pink color map.
    white      - All white color map.
    flag       - Alternating red, white, blue, and black color map.
    lines      - Color map with the line colors.
    colorcube  - Enhanced color-cube color map.
    jet        - Variant of HSV.
    prism      - Prism color map.
    cool       - Shades of cyan and magenta color map.
    autumn     - Shades of red and yellow color map.
    spring     - Shades of magenta and yellow color map.
    winter     - Shades of blue and green color map.
    summer     - Shades of green and yellow color map.