/*
  cpt-city: jmn/jmn-d10 (cpt)

  A colourmap with monotonic luminance for simultaneous colour and
  grey-scale publications.

  J. McNames, "An effective color scale for simultaneous color and
  gray-scale publications," in IEEE Signal Processing Magazine,
  vol. 23, no. 1, pp. 82-96, Jan. 2006,

  author: James McNames
  copyright: Free to use
  year: 2009
  url: https://phillips.shef.ac.uk/pub/cpt-city/jmn
*/
linear-gradient(
  0deg,
  rgb(255, 255, 255)   0.000%,
  rgb(255, 255, 255)  10.000%,
  rgb(221, 205, 253)  10.000%,
  rgb(221, 205, 253)  20.000%,
  rgb(155, 188, 251)  20.000%,
  rgb(155, 188, 251)  30.000%,
  rgb( 85, 212, 212)  30.000%,
  rgb( 85, 212, 212)  40.000%,
  rgb( 55, 246, 122)  40.000%,
  rgb( 55, 246, 122)  50.000%,
  rgb( 93, 218,  27)  50.000%,
  rgb( 93, 218,  27)  60.000%,
  rgb(127, 127,   0)  60.000%,
  rgb(127, 127,   0)  70.000%,
  rgb(109,  46,  13)  70.000%,
  rgb(109,  46,  13)  80.000%,
  rgb( 54,   6,  23)  80.000%,
  rgb( 54,   6,  23)  90.000%,
  rgb(  0,   0,   0)  90.000%,
  rgb(  0,   0,   0) 100.000%
);