/*
  cpt-city: pm/pm3d15 (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( 48,  16,   0)   1.587%,
  rgb( 77,  13,   0)   3.175%,
  rgb(102,   7,   0)   4.762%,
  rgb(126,   0,   0)   6.349%,
  rgb(147,   0,   0)   7.936%,
  rgb(168,   0,   0)   9.524%,
  rgb(186,   0,   0)  11.111%,
  rgb(204,   0,   0)  12.698%,
  rgb(219,   0,   0)  14.286%,
  rgb(234,   0,   0)  15.873%,
  rgb(246,   0,   0)  17.460%,
  rgb(255,   0,   0)  19.048%,
  rgb(255,   0,   0)  20.635%,
  rgb(255,   0,   0)  22.222%,
  rgb(255,   0,   0)  23.809%,
  rgb(255,   0,   0)  25.397%,
  rgb(255,   0,   0)  26.984%,
  rgb(255,   0,   0)  28.571%,
  rgb(255,   0,   0)  30.159%,
  rgb(255,   0,   0)  31.746%,
  rgb(255,   2,   0)  33.333%,
  rgb(255,  14,   0)  34.921%,
  rgb(255,  27,   0)  36.508%,
  rgb(252,  41,   0)  38.095%,
  rgb(241,  57,   0)  39.682%,
  rgb(229,  73,   0)  41.270%,
  rgb(216,  90,   0)  42.857%,
  rgb(203, 107,   0)  44.444%,
  rgb(188, 126,  38)  46.032%,
  rgb(173, 144,  81)  47.619%,
  rgb(158, 162, 124)  49.206%,
  rgb(150, 173, 145)  50.794%,
  rgb(150, 175, 144)  52.381%,
  rgb(149, 176, 143)  53.968%,
  rgb(148, 178, 142)  55.556%,
  rgb(147, 180, 140)  57.143%,
  rgb(146, 181, 138)  58.730%,
  rgb(145, 183, 136)  60.318%,
  rgb(143, 184, 134)  61.905%,
  rgb(141, 185, 131)  63.492%,
  rgb(139, 187, 128)  65.079%,
  rgb(136, 188, 125)  66.667%,
  rgb(133, 189, 121)  68.254%,
  rgb(130, 189, 117)  69.841%,
  rgb(127, 190, 113)  71.429%,
  rgb(123, 191, 108)  73.016%,
  rgb(119, 191, 103)  74.603%,
  rgb(115, 192,  98)  76.191%,
  rgb(110, 192,  92)  77.778%,
  rgb(105, 192,  86)  79.365%,
  rgb(100, 193,  80)  80.952%,
  rgb( 95, 193,  73)  82.540%,
  rgb( 89, 193,  66)  84.127%,
  rgb( 83, 192,  59)  85.714%,
  rgb( 76, 192,  51)  87.302%,
  rgb( 69, 192,  43)  88.889%,
  rgb( 62, 191,  34)  90.476%,
  rgb( 54, 191,  25)  92.064%,
  rgb( 47, 190,  15)  93.651%,
  rgb( 38, 189,   5)  95.238%,
  rgb( 30, 188,   0)  96.825%,
  rgb( 21, 187,   0)  98.413%,
  rgb( 11, 186,   0) 100.000%
);