LUT CET

        GREG provides the collection of look-up-tables from colorcet.com un-
    der  names cet-*.lut. These LUTs have uniform contrast which avoid miss-
    ing significant features in the  data  and  detecting  false  ones  (see
    https://colorcet.com for details).

    In practice the file name suffix encodes:
      - cet-l*.lut: linear color maps,
      - cet-d*.lut:  diverging  color  maps  (differentiate  values that lie
        above, or below, a reference value),
      - cet-r*.lut: rainbow color maps,
      - cet-c*.lut: cyclic color maps (colors are matched at each end),
      - cet-i*.lut: isoluminant color maps (equal perception lightness),
      - cet-cb**.lut: color blind maps (the 'cb' characters are added in ad-
        dition to the previous nomenclature).
    Last, a trailing "s" stands for shifted colors.

    These colour maps are released under the Creative Commons BY License.