/*
  cpt-city: km/blue-yellow-d15 (cpt)

  Diverging Color Maps for Scientific Visualization, Kenneth
  Moreland. ISVC '09: Proceedings of the 5th International
  Symposium on Advances in Visual Computing: Part II pp, 92-103

  author: Kenneth Moreland
  copyright: Public domain
  year: 2012
  url: https://phillips.shef.ac.uk/pub/cpt-city/km
*/
linear-gradient(
  0deg,
  rgb( 18,  18, 234)   0.000%,
  rgb( 18,  18, 234)   6.667%,
  rgb( 34,  34, 219)   6.667%,
  rgb( 34,  34, 219)  13.333%,
  rgb( 49,  49, 203)  13.333%,
  rgb( 49,  49, 203)  20.000%,
  rgb( 65,  65, 188)  20.000%,
  rgb( 65,  65, 188)  26.667%,
  rgb( 80,  80, 172)  26.667%,
  rgb( 80,  80, 172)  33.333%,
  rgb( 95,  95, 157)  33.333%,
  rgb( 95,  95, 157)  40.000%,
  rgb(111, 111, 142)  40.000%,
  rgb(111, 111, 142)  46.667%,
  rgb(126, 126, 126)  46.667%,
  rgb(126, 126, 126)  53.333%,
  rgb(142, 142, 111)  53.333%,
  rgb(142, 142, 111)  60.000%,
  rgb(157, 157,  95)  60.000%,
  rgb(157, 157,  95)  66.667%,
  rgb(172, 172,  80)  66.667%,
  rgb(172, 172,  80)  73.333%,
  rgb(188, 188,  65)  73.333%,
  rgb(188, 188,  65)  80.000%,
  rgb(203, 203,  49)  80.000%,
  rgb(203, 203,  49)  86.667%,
  rgb(219, 219,  34)  86.667%,
  rgb(219, 219,  34)  93.333%,
  rgb(234, 234,  18)  93.333%,
  rgb(234, 234,  18) 100.000%
);