/*
  cpt-city: pm/pm3d04 (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( 16,  16,  16)   0.000%,
  rgb( 27,  15,  15)   1.587%,
  rgb( 39,  14,  14)   3.175%,
  rgb( 50,  14,  14)   4.762%,
  rgb( 62,  13,  13)   6.349%,
  rgb( 73,  12,  12)   7.936%,
  rgb( 84,  11,  11)   9.524%,
  rgb( 96,  11,  11)  11.111%,
  rgb(107,  10,  10)  12.698%,
  rgb(118,   9,   9)  14.286%,
  rgb(130,   8,   8)  15.873%,
  rgb(141,   8,   8)  17.460%,
  rgb(153,   7,   7)  19.048%,
  rgb(164,   6,   6)  20.635%,
  rgb(175,   5,   5)  22.222%,
  rgb(187,   5,   5)  23.809%,
  rgb(198,   4,   4)  25.397%,
  rgb(209,   3,   3)  26.984%,
  rgb(221,   2,   2)  28.571%,
  rgb(232,   2,   2)  30.159%,
  rgb(244,   1,   1)  31.746%,
  rgb(255,   0,   0)  33.333%,
  rgb(243,  12,   0)  34.921%,
  rgb(231,  24,   0)  36.508%,
  rgb(219,  36,   0)  38.095%,
  rgb(206,  49,   0)  39.682%,
  rgb(194,  61,   0)  41.270%,
  rgb(182,  73,   0)  42.857%,
  rgb(170,  85,   0)  44.444%,
  rgb(158,  97,   0)  46.032%,
  rgb(146, 109,   0)  47.619%,
  rgb(134, 121,   0)  49.206%,
  rgb(121, 134,   0)  50.794%,
  rgb(109, 146,   0)  52.381%,
  rgb( 97, 158,   0)  53.968%,
  rgb( 85, 170,   0)  55.556%,
  rgb( 73, 182,   0)  57.143%,
  rgb( 61, 194,   0)  58.730%,
  rgb( 49, 206,   0)  60.318%,
  rgb( 36, 219,   0)  61.905%,
  rgb( 24, 231,   0)  63.492%,
  rgb( 12, 243,   0)  65.079%,
  rgb(  0, 255,   0)  66.667%,
  rgb( 11, 254,  11)  68.254%,
  rgb( 21, 252,  21)  69.841%,
  rgb( 32, 251,  32)  71.429%,
  rgb( 43, 249,  43)  73.016%,
  rgb( 53, 248,  53)  74.603%,
  rgb( 64, 246,  64)  76.191%,
  rgb( 75, 245,  75)  77.778%,
  rgb( 85, 243,  85)  79.365%,
  rgb( 96, 242,  96)  80.952%,
  rgb(107, 240, 107)  82.540%,
  rgb(117, 239, 117)  84.127%,
  rgb(128, 237, 128)  85.714%,
  rgb(139, 236, 139)  87.302%,
  rgb(149, 234, 149)  88.889%,
  rgb(160, 233, 160)  90.476%,
  rgb(171, 231, 171)  92.064%,
  rgb(181, 230, 181)  93.651%,
  rgb(192, 228, 192)  95.238%,
  rgb(203, 227, 203)  96.825%,
  rgb(213, 225, 213)  98.413%,
  rgb(224, 224, 224) 100.000%
);