/*
  cpt-city: pm/pm3d09 (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,  24)   1.587%,
  rgb(  0,   0,  49)   3.175%,
  rgb(  0,   0,  73)   4.762%,
  rgb(  0,   0,  97)   6.349%,
  rgb(  0,   0, 121)   7.936%,
  rgb(  0,   0, 146)   9.524%,
  rgb(  0,   0, 170)  11.111%,
  rgb(  0,   0, 194)  12.698%,
  rgb(  0,   0, 219)  14.286%,
  rgb(  0,   0, 243)  15.873%,
  rgb(  0,   6, 249)  17.460%,
  rgb(  0,  18, 237)  19.048%,
  rgb(  0,  30, 225)  20.635%,
  rgb(  0,  42, 213)  22.222%,
  rgb(  0,  55, 200)  23.809%,
  rgb(  0,  67, 188)  25.397%,
  rgb(  0,  79, 176)  26.984%,
  rgb(  0,  91, 164)  28.571%,
  rgb(  0, 103, 152)  30.159%,
  rgb(  0, 115, 140)  31.746%,
  rgb(  0, 127, 128)  33.333%,
  rgb(  0, 140, 115)  34.921%,
  rgb(  0, 152, 103)  36.508%,
  rgb(  0, 164,  91)  38.095%,
  rgb(  0, 176,  79)  39.682%,
  rgb(  0, 188,  67)  41.270%,
  rgb(  0, 200,  55)  42.857%,
  rgb(  0, 212,  43)  44.444%,
  rgb(  0, 225,  30)  46.032%,
  rgb(  0, 237,  18)  47.619%,
  rgb(  0, 249,   6)  49.206%,
  rgb(  6, 249,   0)  50.794%,
  rgb( 18, 237,   0)  52.381%,
  rgb( 30, 225,   0)  53.968%,
  rgb( 43, 212,   0)  55.556%,
  rgb( 55, 200,   0)  57.143%,
  rgb( 67, 188,   0)  58.730%,
  rgb( 79, 176,   0)  60.318%,
  rgb( 91, 164,   0)  61.905%,
  rgb(103, 152,   0)  63.492%,
  rgb(115, 140,   0)  65.079%,
  rgb(128, 127,   0)  66.667%,
  rgb(140, 115,   0)  68.254%,
  rgb(152, 103,   0)  69.841%,
  rgb(164,  91,   0)  71.429%,
  rgb(176,  79,   0)  73.016%,
  rgb(188,  67,   0)  74.603%,
  rgb(200,  55,   0)  76.191%,
  rgb(213,  42,   0)  77.778%,
  rgb(225,  30,   0)  79.365%,
  rgb(237,  18,   0)  80.952%,
  rgb(249,   6,   0)  82.540%,
  rgb(255,  12,  12)  84.127%,
  rgb(255,  36,  36)  85.714%,
  rgb(255,  61,  61)  87.302%,
  rgb(255,  85,  85)  88.889%,
  rgb(255, 109, 109)  90.476%,
  rgb(255, 134, 134)  92.064%,
  rgb(255, 158, 158)  93.651%,
  rgb(255, 182, 182)  95.238%,
  rgb(255, 206, 206)  96.825%,
  rgb(255, 231, 231)  98.413%,
  rgb(255, 255, 255) 100.000%
);