/*
  cpt-city: pm/pm3d13 (cpt)

  Various gradients from Gnuplot: the original default pm3d
  colour gradient by Petr Mikulík from Masaryk University,
  nice rgb schemes listed in “help palette rgbformulae”
  and gradients from the pm3dcolors.dem demo script

  author: Petr Mikulik
  copyright: GPLv2
  year: 2006
  url: https://phillips.shef.ac.uk/pub/cpt-city/pm
*/
linear-gradient(
  0deg,
  rgb(  0,   0,   0)   0.000%,
  rgb( 54,   0,   0)   1.587%,
  rgb( 72,   0,   0)   3.175%,
  rgb( 85,   0,   0)   4.762%,
  rgb( 94,   0,   0)   6.349%,
  rgb(102,   0,   0)   7.936%,
  rgb(109,   0,   0)   9.524%,
  rgb(115,   0,   0)  11.111%,
  rgb(121,   0,   0)  12.698%,
  rgb(126,   0,   0)  14.286%,
  rgb(132,   0,   0)  15.873%,
  rgb(137,   0,   0)  17.460%,
  rgb(143,   0,   0)  19.048%,
  rgb(149,   0,   0)  20.635%,
  rgb(156,   0,   0)  22.222%,
  rgb(162,   0,   0)  23.809%,
  rgb(170,   0,   0)  25.397%,
  rgb(177,   0,   0)  26.984%,
  rgb(185,   0,   0)  28.571%,
  rgb(194,   0,   0)  30.159%,
  rgb(203,   0,   0)  31.746%,
  rgb(212,   0,   0)  33.333%,
  rgb(222,   0,   0)  34.921%,
  rgb(232,   0,   0)  36.508%,
  rgb(243,   0,   0)  38.095%,
  rgb(254,   0,   0)  39.682%,
  rgb(255,   0,   0)  41.270%,
  rgb(255,   0,   0)  42.857%,
  rgb(255,   0,   0)  44.444%,
  rgb(255,   0,   0)  46.032%,
  rgb(255,   0,   0)  47.619%,
  rgb(255,   0,   0)  49.206%,
  rgb(255,   0,   7)  50.794%,
  rgb(255,   0,   6)  52.381%,
  rgb(255,   0,   6)  53.968%,
  rgb(255,   0,   6)  55.556%,
  rgb(255,   0,   6)  57.143%,
  rgb(255,   0,   5)  58.730%,
  rgb(255,   0,   5)  60.318%,
  rgb(255,   0,   5)  61.905%,
  rgb(255,   0,   4)  63.492%,
  rgb(255,   0,   4)  65.079%,
  rgb(255,   0,   3)  66.667%,
  rgb(255,   0,   3)  68.254%,
  rgb(255,   0,   2)  69.841%,
  rgb(255,   0,   2)  71.429%,
  rgb(255,   0,   1)  73.016%,
  rgb(255,   0,   0)  74.603%,
  rgb(255,   6,   0)  76.191%,
  rgb(255,  18,   0)  77.778%,
  rgb(255,  31,   0)  79.365%,
  rgb(255,  45,   0)  80.952%,
  rgb(255,  59,   0)  82.540%,
  rgb(255,  73,   0)  84.127%,
  rgb(255,  89,   0)  85.714%,
  rgb(255, 105,   0)  87.302%,
  rgb(255, 121,   0)  88.889%,
  rgb(255, 139,   0)  90.476%,
  rgb(255, 157,   0)  92.064%,
  rgb(255, 176,   0)  93.651%,
  rgb(255, 195,   0)  95.238%,
  rgb(255, 216,   0)  96.825%,
  rgb(255, 237,   0)  98.413%,
  rgb(255, 255,   0) 100.000%
);