/*
  cpt-city: pm/pm3d05 (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(  4,   4,   4)   1.587%,
  rgb(  8,   8,   8)   3.175%,
  rgb( 12,  12,  12)   4.762%,
  rgb( 16,  16,  16)   6.349%,
  rgb( 20,  20,  20)   7.936%,
  rgb( 24,  24,  24)   9.524%,
  rgb( 28,  28,  28)  11.111%,
  rgb( 32,  32,  32)  12.698%,
  rgb( 36,  36,  36)  14.286%,
  rgb( 40,  40,  40)  15.873%,
  rgb( 45,  45,  45)  17.460%,
  rgb( 49,  49,  49)  19.048%,
  rgb( 53,  53,  53)  20.635%,
  rgb( 57,  57,  57)  22.222%,
  rgb( 61,  61,  61)  23.809%,
  rgb( 65,  65,  65)  25.397%,
  rgb( 69,  69,  69)  26.984%,
  rgb( 73,  73,  73)  28.571%,
  rgb( 77,  77,  77)  30.159%,
  rgb( 81,  81,  81)  31.746%,
  rgb( 85,  85,  85)  33.333%,
  rgb( 89,  89,  89)  34.921%,
  rgb( 93,  93,  93)  36.508%,
  rgb( 97,  97,  97)  38.095%,
  rgb(101, 101, 101)  39.682%,
  rgb(105, 105, 105)  41.270%,
  rgb(109, 109, 109)  42.857%,
  rgb(113, 113, 113)  44.444%,
  rgb(117, 117, 117)  46.032%,
  rgb(121, 121, 121)  47.619%,
  rgb(125, 125, 125)  49.206%,
  rgb(130, 130, 130)  50.794%,
  rgb(134, 134, 134)  52.381%,
  rgb(138, 138, 138)  53.968%,
  rgb(142, 142, 142)  55.556%,
  rgb(146, 146, 146)  57.143%,
  rgb(150, 150, 150)  58.730%,
  rgb(154, 154, 154)  60.318%,
  rgb(158, 158, 158)  61.905%,
  rgb(162, 162, 162)  63.492%,
  rgb(166, 166, 166)  65.079%,
  rgb(170, 170, 170)  66.667%,
  rgb(174, 174, 174)  68.254%,
  rgb(178, 178, 178)  69.841%,
  rgb(182, 182, 182)  71.429%,
  rgb(186, 186, 186)  73.016%,
  rgb(190, 190, 190)  74.603%,
  rgb(194, 194, 194)  76.191%,
  rgb(198, 198, 198)  77.778%,
  rgb(202, 202, 202)  79.365%,
  rgb(206, 206, 206)  80.952%,
  rgb(210, 210, 210)  82.540%,
  rgb(215, 215, 215)  84.127%,
  rgb(219, 219, 219)  85.714%,
  rgb(223, 223, 223)  87.302%,
  rgb(227, 227, 227)  88.889%,
  rgb(231, 231, 231)  90.476%,
  rgb(235, 235, 235)  92.064%,
  rgb(239, 239, 239)  93.651%,
  rgb(243, 243, 243)  95.238%,
  rgb(247, 247, 247)  96.825%,
  rgb(251, 251, 251)  98.413%,
  rgb(255, 255, 255) 100.000%
);