/*
  cpt-city: xkcd/xkcd-heatmap (cpt)

  Randall Munroe's heatmap scheme as used in XKCD episode
  1128, Heatmap

  author: Randall Munroe
  copyright: Creative Commons Attribution-NonCommercial 2.5 Generic
  year: 2012
  url: https://phillips.shef.ac.uk/pub/cpt-city/xkcd
*/
linear-gradient(
  0deg,
  rgb(255, 255, 255)   0.000%,
  rgb(255, 255, 255)  25.000%,
  rgb(125, 250,  86)  25.000%,
  rgb(125, 250,  86)  50.000%,
  rgb(254, 255,  86)  50.000%,
  rgb(254, 255,  86)  75.000%,
  rgb(255, 136,  98)  75.000%,
  rgb(255, 136,  98) 100.000%
);