/*
  cpt-city: pm/f-30-31-32 (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(  0,   0,  16)   1.587%,
  rgb(  0,   0,  32)   3.175%,
  rgb(  0,   0,  49)   4.762%,
  rgb(  0,   0,  65)   6.349%,
  rgb(  0,   0,  81)   7.936%,
  rgb(  0,   0,  97)   9.524%,
  rgb(  0,   0, 113)  11.111%,
  rgb(  0,   0, 130)  12.698%,
  rgb(  0,   0, 146)  14.286%,
  rgb(  0,   0, 162)  15.873%,
  rgb(  0,   0, 178)  17.460%,
  rgb(  0,   0, 194)  19.048%,
  rgb(  0,   0, 210)  20.635%,
  rgb(  0,   0, 227)  22.222%,
  rgb(  0,   0, 243)  23.809%,
  rgb(  3,   0, 255)  25.397%,
  rgb( 16,   0, 255)  26.984%,
  rgb( 28,   0, 255)  28.571%,
  rgb( 41,   0, 255)  30.159%,
  rgb( 54,   0, 255)  31.746%,
  rgb( 66,   0, 255)  33.333%,
  rgb( 79,   0, 255)  34.921%,
  rgb( 92,   0, 255)  36.508%,
  rgb(104,   0, 255)  38.095%,
  rgb(117,   0, 255)  39.682%,
  rgb(130,   0, 255)  41.270%,
  rgb(142,   4, 251)  42.857%,
  rgb(155,  12, 243)  44.444%,
  rgb(168,  21, 234)  46.032%,
  rgb(180,  29, 226)  47.619%,
  rgb(193,  37, 218)  49.206%,
  rgb(206,  45, 210)  50.794%,
  rgb(218,  53, 202)  52.381%,
  rgb(231,  61, 194)  53.968%,
  rgb(243,  69, 186)  55.556%,
  rgb(255,  77, 178)  57.143%,
  rgb(255,  85, 170)  58.730%,
  rgb(255,  93, 162)  60.318%,
  rgb(255, 102, 153)  61.905%,
  rgb(255, 110, 145)  63.492%,
  rgb(255, 118, 137)  65.079%,
  rgb(255, 126, 129)  66.667%,
  rgb(255, 134, 121)  68.254%,
  rgb(255, 142, 113)  69.841%,
  rgb(255, 150, 105)  71.429%,
  rgb(255, 158,  97)  73.016%,
  rgb(255, 166,  89)  74.603%,
  rgb(255, 174,  81)  76.191%,
  rgb(255, 182,  73)  77.778%,
  rgb(255, 191,  64)  79.365%,
  rgb(255, 199,  56)  80.952%,
  rgb(255, 207,  48)  82.540%,
  rgb(255, 215,  40)  84.127%,
  rgb(255, 223,  32)  85.714%,
  rgb(255, 231,  24)  87.302%,
  rgb(255, 239,  16)  88.889%,
  rgb(255, 247,   8)  90.476%,
  rgb(255, 255,   2)  92.064%,
  rgb(255, 255,  53)  93.651%,
  rgb(255, 255, 103)  95.238%,
  rgb(255, 255, 154)  96.825%,
  rgb(255, 255, 204)  98.413%,
  rgb(255, 255, 255) 100.000%
);