/*
  cpt-city: ncl/spread_15lev (cpt)

  Colour-tables from NCL (NCAR Command Language), an open-source
  interpreted language designed specifically for scientific data
  analysis and visualisation

  author: University Corporation for Atmospheric Research (UCAR)
  copyright: Custom open-source
  year: 2011
  url: https://phillips.shef.ac.uk/pub/cpt-city/ncl
*/
linear-gradient(
  0deg,
  rgb(255, 255, 255)   0.000%,
  rgb(255, 255, 255)   6.667%,
  rgb(255, 225, 225)   6.667%,
  rgb(255, 225, 225)  13.333%,
  rgb(255, 210, 210)  13.333%,
  rgb(255, 210, 210)  20.000%,
  rgb(255, 165, 165)  20.000%,
  rgb(255, 165, 165)  26.667%,
  rgb(255, 120, 120)  26.667%,
  rgb(255, 120, 120)  33.333%,
  rgb(255,  75,  75)  33.333%,
  rgb(255,  75,  75)  40.000%,
  rgb(255,   0,   0)  40.000%,
  rgb(255,   0,   0)  46.667%,
  rgb(255, 100,   0)  46.667%,
  rgb(255, 100,   0)  53.333%,
  rgb(255, 150,   0)  53.333%,
  rgb(255, 150,   0)  60.000%,
  rgb(255, 200,   0)  60.000%,
  rgb(255, 200,   0)  66.667%,
  rgb(255, 255,   0)  66.667%,
  rgb(255, 255,   0)  73.333%,
  rgb(140, 255,   0)  73.333%,
  rgb(140, 255,   0)  80.000%,
  rgb(  0, 255,   0)  80.000%,
  rgb(  0, 255,   0)  86.667%,
  rgb(  0, 205,  95)  86.667%,
  rgb(  0, 205,  95)  93.333%,
  rgb(  0, 145, 200)  93.333%,
  rgb(  0, 145, 200) 100.000%
);