/*
  cpt-city: gacruxa/calpan/calpan-21 (svg)

  Gradients based on integer sequences and traditional Japanese
  colours, by US-based digital artist Gacruxa.

  author: Gacruxa
  copyright: CC BY 3.0
  year: 2014
  url: https://phillips.shef.ac.uk/pub/cpt-city/gacruxa/calpan
*/
linear-gradient(
  0deg,
  rgb( 77,  77,  77)   0.000%,
  rgb( 77,  77,  77)   0.830%,
  rgb( 78,  78,  78)   1.660%,
  rgb( 79,  79,  79)   2.490%,
  rgb( 80,  80,  80)   3.320%,
  rgb( 80,  80,  80)   4.126%,
  rgb( 80,  80,  80)   4.956%,
  rgb( 79,  79,  79)   5.786%,
  rgb( 77,  77,  77)   6.616%,
  rgb(  0,   0,   0)   6.616%,
  rgb(  0,   0,   0)   6.616%,
  rgb(  0,   0,   0)   6.616%,
  rgb(  0,   0,   0)   6.616%,
  rgb(  0,   0,   0)   6.616%,
  rgb(  0,   0,   0)   6.616%,
  rgb(  0,   0,   0)   6.616%,
  rgb( 31,  31,  31)   6.616%,
  rgb( 28,  28,  28)   8.350%,
  rgb( 27,  27,  27)  10.059%,
  rgb( 26,  26,  26)  11.792%,
  rgb( 25,  25,  25)  13.501%,
  rgb( 26,  26,  26)  15.234%,
  rgb( 27,  27,  27)  16.943%,
  rgb( 29,  29,  29)  18.677%,
  rgb( 31,  31,  31)  20.386%,
  rgb( 34,  34,  34)  20.459%,
  rgb( 37,  37,  37)  20.532%,
  rgb( 40,  40,  40)  20.605%,
  rgb( 44,  44,  44)  20.679%,
  rgb( 48,  48,  48)  20.727%,
  rgb( 55,  55,  55)  20.801%,
  rgb( 64,  64,  64)  20.874%,
  rgb( 77,  77,  77)  20.947%,
  rgb( 94,  94,  94)  30.835%,
  rgb(115, 115, 116)  40.723%,
  rgb(140, 140, 141)  50.586%,
  rgb(166, 166, 167)  60.474%,
  rgb(192, 192, 193)  70.361%,
  rgb(215, 215, 217)  80.249%,
  rgb(235, 235, 237)  90.112%,
  rgb(249, 249, 251) 100.000%
);