/*
  cpt-city: nr/pdr/harris-pdr-18 (cpt)

  Schemes from Moses Harris’ coluor wheels in "The Natural System
  of Colours" (1766), recreated by Nicholas Rougeux 2025

  author: Nicholas Rougeux
  copyright: CC0 1.0
  year: 2025
  url: https://phillips.shef.ac.uk/pub/cpt-city/nr/pdr
*/
linear-gradient(
  0deg,
  rgb(161,  70,  41)   0.000%,
  rgb(161,  70,  41)  10.000%,
  rgb(145,  68,  41)  10.000%,
  rgb(145,  68,  41)  20.000%,
  rgb(134,  66,  40)  20.000%,
  rgb(134,  66,  40)  30.000%,
  rgb(119,  65,  41)  30.000%,
  rgb(119,  65,  41)  40.000%,
  rgb(105,  62,  42)  40.000%,
  rgb(105,  62,  42)  50.000%,
  rgb( 97,  59,  41)  50.000%,
  rgb( 97,  59,  41)  60.000%,
  rgb( 85,  57,  43)  60.000%,
  rgb( 85,  57,  43)  80.000%,
  rgb( 62,  50,  42)  80.000%,
  rgb( 62,  50,  42)  90.000%,
  rgb( 54,  49,  45)  90.000%,
  rgb( 54,  49,  45) 100.000%
);