/*
  cpt-city: nr/pdr/harris-pdr-17 (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(115,  63,  57)   0.000%,
  rgb(115,  63,  57)  10.000%,
  rgb(106,  61,  55)  10.000%,
  rgb(106,  61,  55)  20.000%,
  rgb( 99,  59,  54)  20.000%,
  rgb( 99,  59,  54)  30.000%,
  rgb( 92,  60,  56)  30.000%,
  rgb( 92,  60,  56)  40.000%,
  rgb( 84,  57,  53)  40.000%,
  rgb( 84,  57,  53)  50.000%,
  rgb( 78,  56,  52)  50.000%,
  rgb( 78,  56,  52)  60.000%,
  rgb( 71,  53,  49)  60.000%,
  rgb( 71,  53,  49)  70.000%,
  rgb( 64,  51,  49)  70.000%,
  rgb( 64,  51,  49)  80.000%,
  rgb( 57,  48,  46)  80.000%,
  rgb( 57,  48,  46)  90.000%,
  rgb( 53,  49,  48)  90.000%,
  rgb( 53,  49,  48) 100.000%
);