// cpt-city: jmn/jmn-d50 (cpt)
//
// A colourmap with monotonic luminance for simultaneous colour and
// grey-scale publications.
//
// J. McNames, "An effective color scale for simultaneous color and
// gray-scale publications," in IEEE Signal Processing Magazine,
// vol. 23, no. 1, pp. 82-96, Jan. 2006,
//
// author: James McNames
// copyright: Free to use
// year: 2009
// url: https://phillips.shef.ac.uk/pub/cpt-city/jmn
#declare jmn_d50 =
color_map {
  [0.00000 color rgbf <1.0000,1.0000,1.0000,0.0000>]
  [0.02000 color rgbf <1.0000,1.0000,1.0000,0.0000>]
  [0.02000 color rgbf <0.9843,0.9569,0.9882,0.0000>]
  [0.04000 color rgbf <0.9843,0.9569,0.9882,0.0000>]
  [0.04000 color rgbf <0.9686,0.9176,0.9843,0.0000>]
  [0.06000 color rgbf <0.9686,0.9176,0.9843,0.0000>]
  [0.06000 color rgbf <0.9451,0.8784,0.9843,0.0000>]
  [0.08000 color rgbf <0.9451,0.8784,0.9843,0.0000>]
  [0.08000 color rgbf <0.9176,0.8471,0.9882,0.0000>]
  [0.10000 color rgbf <0.9176,0.8471,0.9882,0.0000>]
  [0.10000 color rgbf <0.8824,0.8157,0.9882,0.0000>]
  [0.12000 color rgbf <0.8824,0.8157,0.9882,0.0000>]
  [0.12000 color rgbf <0.8471,0.7882,0.9922,0.0000>]
  [0.14000 color rgbf <0.8471,0.7882,0.9922,0.0000>]
  [0.14000 color rgbf <0.8039,0.7647,0.9961,0.0000>]
  [0.16000 color rgbf <0.8039,0.7647,0.9961,0.0000>]
  [0.16000 color rgbf <0.7569,0.7490,0.9961,0.0000>]
  [0.18000 color rgbf <0.7569,0.7490,0.9961,0.0000>]
  [0.18000 color rgbf <0.7059,0.7412,0.9961,0.0000>]
  [0.20000 color rgbf <0.7059,0.7412,0.9961,0.0000>]
  [0.20000 color rgbf <0.6549,0.7373,0.9922,0.0000>]
  [0.22000 color rgbf <0.6549,0.7373,0.9922,0.0000>]
  [0.22000 color rgbf <0.6000,0.7373,0.9843,0.0000>]
  [0.24000 color rgbf <0.6000,0.7373,0.9843,0.0000>]
  [0.24000 color rgbf <0.5451,0.7451,0.9686,0.0000>]
  [0.26000 color rgbf <0.5451,0.7451,0.9686,0.0000>]
  [0.26000 color rgbf <0.4941,0.7569,0.9490,0.0000>]
  [0.28000 color rgbf <0.4941,0.7569,0.9490,0.0000>]
  [0.28000 color rgbf <0.4392,0.7765,0.9216,0.0000>]
  [0.30000 color rgbf <0.4392,0.7765,0.9216,0.0000>]
  [0.30000 color rgbf <0.3922,0.7961,0.8863,0.0000>]
  [0.32000 color rgbf <0.3922,0.7961,0.8863,0.0000>]
  [0.32000 color rgbf <0.3451,0.8235,0.8471,0.0000>]
  [0.34000 color rgbf <0.3451,0.8235,0.8471,0.0000>]
  [0.34000 color rgbf <0.3059,0.8471,0.7961,0.0000>]
  [0.36000 color rgbf <0.3059,0.8471,0.7961,0.0000>]
  [0.36000 color rgbf <0.2745,0.8745,0.7412,0.0000>]
  [0.38000 color rgbf <0.2745,0.8745,0.7412,0.0000>]
  [0.38000 color rgbf <0.2471,0.9020,0.6784,0.0000>]
  [0.40000 color rgbf <0.2471,0.9020,0.6784,0.0000>]
  [0.40000 color rgbf <0.2275,0.9294,0.6118,0.0000>]
  [0.42000 color rgbf <0.2275,0.9294,0.6118,0.0000>]
  [0.42000 color rgbf <0.2196,0.9529,0.5373,0.0000>]
  [0.44000 color rgbf <0.2196,0.9529,0.5373,0.0000>]
  [0.44000 color rgbf <0.2196,0.9686,0.4588,0.0000>]
  [0.46000 color rgbf <0.2196,0.9686,0.4588,0.0000>]
  [0.46000 color rgbf <0.2275,0.9804,0.3804,0.0000>]
  [0.48000 color rgbf <0.2275,0.9804,0.3804,0.0000>]
  [0.48000 color rgbf <0.2471,0.9804,0.2980,0.0000>]
  [0.50000 color rgbf <0.2471,0.9804,0.2980,0.0000>]
  [0.50000 color rgbf <0.2784,0.9608,0.2275,0.0000>]
  [0.52000 color rgbf <0.2784,0.9608,0.2275,0.0000>]
  [0.52000 color rgbf <0.3176,0.9176,0.1647,0.0000>]
  [0.54000 color rgbf <0.3176,0.9176,0.1647,0.0000>]
  [0.54000 color rgbf <0.3569,0.8667,0.1176,0.0000>]
  [0.56000 color rgbf <0.3569,0.8667,0.1176,0.0000>]
  [0.56000 color rgbf <0.3961,0.8078,0.0745,0.0000>]
  [0.58000 color rgbf <0.3961,0.8078,0.0745,0.0000>]
  [0.58000 color rgbf <0.4275,0.7451,0.0471,0.0000>]
  [0.60000 color rgbf <0.4275,0.7451,0.0471,0.0000>]
  [0.60000 color rgbf <0.4549,0.6784,0.0235,0.0000>]
  [0.62000 color rgbf <0.4549,0.6784,0.0235,0.0000>]
  [0.62000 color rgbf <0.4784,0.6118,0.0078,0.0000>]
  [0.64000 color rgbf <0.4784,0.6118,0.0078,0.0000>]
  [0.64000 color rgbf <0.4902,0.5412,0.0000,0.0000>]
  [0.66000 color rgbf <0.4902,0.5412,0.0000,0.0000>]
  [0.66000 color rgbf <0.4980,0.4745,0.0000,0.0000>]
  [0.68000 color rgbf <0.4980,0.4745,0.0000,0.0000>]
  [0.68000 color rgbf <0.4980,0.4078,0.0039,0.0000>]
  [0.70000 color rgbf <0.4980,0.4078,0.0039,0.0000>]
  [0.70000 color rgbf <0.4941,0.3451,0.0118,0.0000>]
  [0.72000 color rgbf <0.4941,0.3451,0.0118,0.0000>]
  [0.72000 color rgbf <0.4784,0.2902,0.0235,0.0000>]
  [0.74000 color rgbf <0.4784,0.2902,0.0235,0.0000>]
  [0.74000 color rgbf <0.4588,0.2353,0.0353,0.0000>]
  [0.76000 color rgbf <0.4588,0.2353,0.0353,0.0000>]
  [0.76000 color rgbf <0.4314,0.1882,0.0510,0.0000>]
  [0.78000 color rgbf <0.4314,0.1882,0.0510,0.0000>]
  [0.78000 color rgbf <0.4000,0.1451,0.0627,0.0000>]
  [0.80000 color rgbf <0.4000,0.1451,0.0627,0.0000>]
  [0.80000 color rgbf <0.3647,0.1059,0.0745,0.0000>]
  [0.82000 color rgbf <0.3647,0.1059,0.0745,0.0000>]
  [0.82000 color rgbf <0.3255,0.0784,0.0824,0.0000>]
  [0.84000 color rgbf <0.3255,0.0784,0.0824,0.0000>]
  [0.84000 color rgbf <0.2824,0.0510,0.0902,0.0000>]
  [0.86000 color rgbf <0.2824,0.0510,0.0902,0.0000>]
  [0.86000 color rgbf <0.2392,0.0314,0.0902,0.0000>]
  [0.88000 color rgbf <0.2392,0.0314,0.0902,0.0000>]
  [0.88000 color rgbf <0.1922,0.0196,0.0863,0.0000>]
  [0.90000 color rgbf <0.1922,0.0196,0.0863,0.0000>]
  [0.90000 color rgbf <0.1490,0.0078,0.0824,0.0000>]
  [0.92000 color rgbf <0.1490,0.0078,0.0824,0.0000>]
  [0.92000 color rgbf <0.1059,0.0039,0.0667,0.0000>]
  [0.94000 color rgbf <0.1059,0.0039,0.0667,0.0000>]
  [0.94000 color rgbf <0.0667,0.0000,0.0510,0.0000>]
  [0.96000 color rgbf <0.0667,0.0000,0.0510,0.0000>]
  [0.96000 color rgbf <0.0314,0.0000,0.0275,0.0000>]
  [0.98000 color rgbf <0.0314,0.0000,0.0275,0.0000>]
  [0.98000 color rgbf <0.0000,0.0000,0.0000,0.0000>]
  [1.00000 color rgbf <0.0000,0.0000,0.0000,0.0000>]
}