/*
  cpt-city: fme/metres/spiral (cpt)

  Gradients taken from the source-code of drawmap, a cartographic
  package by Fred M. Erickson

  author: Fred M. Erickson
  copyright: GPLv2
  year: 2005
  url: https://phillips.shef.ac.uk/pub/cpt-city/fme/metres
*/
linear-gradient(
  0deg,
  rgb( 60, 255,  60)   0.000%,
  rgb(255, 255,  60)   3.333%,
  rgb(255, 165,  60)   6.667%,
  rgb(255,  60,  60)  10.000%,
  rgb(255,  60, 255)  13.333%,
  rgb( 60, 255, 255)  16.667%,
  rgb(165, 255, 165)  20.000%,
  rgb(255, 255, 165)  23.333%,
  rgb(255, 210, 165)  26.667%,
  rgb(255, 165, 165)  30.000%,
  rgb(255, 165, 255)  33.333%,
  rgb(165, 165, 255)  36.667%,
  rgb(165, 255, 255)  40.000%,
  rgb(255, 255, 255) 100.000%
);