/*
  cpt-city: bgs/sand (cpt)

  British Geological Survey, schemes from the GeoIndex site

  author: British Geological Survey
  copyright: Crown Copyright, UK Open Government Licence for Public Sector Information v3.0
  year: 2026
  url: https://phillips.shef.ac.uk/pub/cpt-city/bgs
*/
linear-gradient(
  0deg,
  rgb(122,  43,   5)   0.000%,
  rgb(156,  54,   3)  10.000%,
  rgb(193,  71,   3)  20.000%,
  rgb(221,  95,  11)  30.000%,
  rgb(240, 123,  25)  40.000%,
  rgb(252, 153,  42)  50.000%,
  rgb(254, 184,  69)  60.000%,
  rgb(253, 210, 109)  70.000%,
  rgb(254, 231, 153)  80.000%,
  rgb(254, 245, 185)  90.000%,
  rgb(255, 252, 213) 100.000%
);