// cpt-city: xkcd/xkcd-painbow (cpt)
//
// Randall Munroe's painbow scheme as used in XKCD episode
// 2537, Painbow Award
//
// author: Randall Munroe
// copyright: Creative Commons Attribution-NonCommercial 2.5 Generic
// year: 2012
// url: https://phillips.shef.ac.uk/pub/cpt-city/xkcd
#declare xkcd_painbow =
color_map {
  [0.00000 color rgbf <1.0000,1.0000,1.0000,0.0000>]
  [0.00833 color rgbf <0.9804,0.9804,0.9882,0.0000>]
  [0.01667 color rgbf <0.9412,0.9412,0.9569,0.0000>]
  [0.02500 color rgbf <0.8941,0.8941,0.9255,0.0000>]
  [0.03333 color rgbf <0.8353,0.8353,0.8824,0.0000>]
  [0.04167 color rgbf <0.7725,0.7725,0.8275,0.0000>]
  [0.05000 color rgbf <0.6980,0.7098,0.7725,0.0000>]
  [0.05833 color rgbf <0.6275,0.6392,0.7176,0.0000>]
  [0.06667 color rgbf <0.5647,0.5725,0.6549,0.0000>]
  [0.07500 color rgbf <0.5098,0.5216,0.5961,0.0000>]
  [0.08333 color rgbf <0.4510,0.4667,0.5294,0.0000>]
  [0.09167 color rgbf <0.3961,0.3961,0.4549,0.0000>]
  [0.10000 color rgbf <0.3333,0.3333,0.3843,0.0000>]
  [0.10833 color rgbf <0.2667,0.2667,0.3059,0.0000>]
  [0.11667 color rgbf <0.2039,0.2000,0.2235,0.0000>]
  [0.12500 color rgbf <0.1451,0.1373,0.1569,0.0000>]
  [0.13333 color rgbf <0.0902,0.0863,0.0941,0.0000>]
  [0.14167 color rgbf <0.0431,0.0431,0.0353,0.0000>]
  [0.15000 color rgbf <0.0078,0.0078,0.0118,0.0000>]
  [0.15833 color rgbf <0.0000,0.0000,0.0039,0.0000>]
  [0.16667 color rgbf <0.0000,0.0000,0.0431,0.0000>]
  [0.17500 color rgbf <0.0039,0.0196,0.1294,0.0000>]
  [0.18333 color rgbf <0.0353,0.0745,0.2275,0.0000>]
  [0.19167 color rgbf <0.0784,0.1216,0.3059,0.0000>]
  [0.20000 color rgbf <0.1137,0.1569,0.3412,0.0000>]
  [0.20833 color rgbf <0.1608,0.1961,0.3804,0.0000>]
  [0.21667 color rgbf <0.2118,0.2431,0.4235,0.0000>]
  [0.22500 color rgbf <0.2549,0.2902,0.4627,0.0000>]
  [0.23333 color rgbf <0.3059,0.3373,0.4980,0.0000>]
  [0.24167 color rgbf <0.3412,0.3804,0.5216,0.0000>]
  [0.25000 color rgbf <0.3725,0.4157,0.5412,0.0000>]
  [0.25833 color rgbf <0.3765,0.4471,0.5490,0.0000>]
  [0.26667 color rgbf <0.3490,0.4706,0.5255,0.0000>]
  [0.27500 color rgbf <0.2745,0.4902,0.4941,0.0000>]
  [0.28333 color rgbf <0.2118,0.4863,0.4471,0.0000>]
  [0.29167 color rgbf <0.1333,0.4863,0.3922,0.0000>]
  [0.30000 color rgbf <0.0745,0.4863,0.3412,0.0000>]
  [0.30833 color rgbf <0.0196,0.4902,0.2902,0.0000>]
  [0.31667 color rgbf <0.1255,0.4667,0.2471,0.0000>]
  [0.32500 color rgbf <0.2000,0.4039,0.2000,0.0000>]
  [0.33333 color rgbf <0.3804,0.3098,0.1569,0.0000>]
  [0.34167 color rgbf <0.5569,0.2118,0.1137,0.0000>]
  [0.35000 color rgbf <0.7451,0.1137,0.0745,0.0000>]
  [0.35833 color rgbf <0.8863,0.0549,0.0431,0.0000>]
  [0.36667 color rgbf <0.9804,0.0039,0.0157,0.0000>]
  [0.37500 color rgbf <0.9961,0.0118,0.0039,0.0000>]
  [0.38333 color rgbf <0.9922,0.0078,0.0000,0.0000>]
  [0.39167 color rgbf <0.9882,0.0118,0.0078,0.0000>]
  [0.40000 color rgbf <0.9804,0.0157,0.0039,0.0000>]
  [0.40833 color rgbf <0.9725,0.0196,0.0000,0.0000>]
  [0.41667 color rgbf <0.9608,0.0353,0.0000,0.0000>]
  [0.42500 color rgbf <0.9451,0.0392,0.0039,0.0000>]
  [0.43333 color rgbf <0.9255,0.0627,0.0000,0.0000>]
  [0.44167 color rgbf <0.9059,0.0745,0.0078,0.0000>]
  [0.45000 color rgbf <0.8824,0.0784,0.0000,0.0000>]
  [0.45833 color rgbf <0.8627,0.0980,0.0000,0.0000>]
  [0.46667 color rgbf <0.8392,0.1176,0.0000,0.0000>]
  [0.47500 color rgbf <0.8157,0.1294,0.0039,0.0000>]
  [0.48333 color rgbf <0.7804,0.1569,0.0000,0.0000>]
  [0.49167 color rgbf <0.7608,0.1647,0.0039,0.0000>]
  [0.50000 color rgbf <0.7216,0.1922,0.0039,0.0000>]
  [0.50833 color rgbf <0.6980,0.2078,0.0039,0.0000>]
  [0.51667 color rgbf <0.6627,0.2275,0.0039,0.0000>]
  [0.52500 color rgbf <0.6353,0.2471,0.0078,0.0000>]
  [0.53333 color rgbf <0.6000,0.2745,0.0078,0.0000>]
  [0.54167 color rgbf <0.5686,0.2902,0.0039,0.0000>]
  [0.55000 color rgbf <0.5373,0.3137,0.0039,0.0000>]
  [0.55833 color rgbf <0.5098,0.3333,0.0118,0.0000>]
  [0.56667 color rgbf <0.4745,0.3569,0.0157,0.0000>]
  [0.57500 color rgbf <0.4392,0.3804,0.0118,0.0000>]
  [0.58333 color rgbf <0.4078,0.4039,0.0157,0.0000>]
  [0.59167 color rgbf <0.3725,0.4275,0.0235,0.0000>]
  [0.60000 color rgbf <0.3451,0.4471,0.0235,0.0000>]
  [0.60833 color rgbf <0.3137,0.4667,0.0275,0.0000>]
  [0.61667 color rgbf <0.2902,0.4863,0.0314,0.0000>]
  [0.62500 color rgbf <0.2627,0.5098,0.0353,0.0000>]
  [0.63333 color rgbf <0.2392,0.5294,0.0392,0.0000>]
  [0.64167 color rgbf <0.2078,0.5490,0.0471,0.0000>]
  [0.65000 color rgbf <0.1843,0.5686,0.0510,0.0000>]
  [0.65833 color rgbf <0.1647,0.5882,0.0549,0.0000>]
  [0.66667 color rgbf <0.1451,0.6118,0.0549,0.0000>]
  [0.67500 color rgbf <0.1216,0.6275,0.0588,0.0000>]
  [0.68333 color rgbf <0.1137,0.6431,0.0667,0.0000>]
  [0.69167 color rgbf <0.1176,0.6588,0.0706,0.0000>]
  [0.70000 color rgbf <0.1098,0.6745,0.0784,0.0000>]
  [0.70833 color rgbf <0.0902,0.6863,0.0824,0.0000>]
  [0.71667 color rgbf <0.0510,0.6980,0.0863,0.0000>]
  [0.72500 color rgbf <0.0431,0.7137,0.0824,0.0000>]
  [0.73333 color rgbf <0.0784,0.7294,0.0980,0.0000>]
  [0.74167 color rgbf <0.0471,0.7529,0.1098,0.0000>]
  [0.75000 color rgbf <0.0667,0.7725,0.1216,0.0000>]
  [0.75833 color rgbf <0.0784,0.7922,0.1333,0.0000>]
  [0.76667 color rgbf <0.1216,0.8078,0.1490,0.0000>]
  [0.77500 color rgbf <0.1569,0.8235,0.1608,0.0000>]
  [0.78333 color rgbf <0.1882,0.8353,0.1725,0.0000>]
  [0.79167 color rgbf <0.2275,0.8471,0.1882,0.0000>]
  [0.80000 color rgbf <0.2745,0.8588,0.2039,0.0000>]
  [0.80833 color rgbf <0.3255,0.8706,0.2196,0.0000>]
  [0.81667 color rgbf <0.3608,0.8824,0.2353,0.0000>]
  [0.82500 color rgbf <0.4078,0.8902,0.2510,0.0000>]
  [0.83333 color rgbf <0.4667,0.8941,0.2667,0.0000>]
  [0.84167 color rgbf <0.5176,0.9059,0.2824,0.0000>]
  [0.85000 color rgbf <0.5529,0.9137,0.3059,0.0000>]
  [0.85833 color rgbf <0.5922,0.9216,0.3255,0.0000>]
  [0.86667 color rgbf <0.6431,0.9255,0.3412,0.0000>]
  [0.87500 color rgbf <0.6706,0.9333,0.3569,0.0000>]
  [0.88333 color rgbf <0.7176,0.9333,0.3765,0.0000>]
  [0.89167 color rgbf <0.7451,0.9412,0.3961,0.0000>]
  [0.90000 color rgbf <0.7686,0.9490,0.4157,0.0000>]
  [0.90833 color rgbf <0.8000,0.9490,0.4353,0.0000>]
  [0.91667 color rgbf <0.8275,0.9451,0.4784,0.0000>]
  [0.92500 color rgbf <0.8471,0.9451,0.5137,0.0000>]
  [0.93333 color rgbf <0.8588,0.9529,0.5490,0.0000>]
  [0.94167 color rgbf <0.8706,0.9490,0.5922,0.0000>]
  [0.95000 color rgbf <0.8784,0.9490,0.6314,0.0000>]
  [0.95833 color rgbf <0.8902,0.9451,0.6784,0.0000>]
  [0.96667 color rgbf <0.8902,0.9412,0.7216,0.0000>]
  [0.97500 color rgbf <0.8941,0.9333,0.7569,0.0000>]
  [0.98333 color rgbf <0.8980,0.9294,0.7961,0.0000>]
  [0.99167 color rgbf <0.9020,0.9216,0.8275,0.0000>]
  [1.00000 color rgbf <0.9059,0.9176,0.8627,0.0000>]
}