// cpt-city: jjg/polarity/RdGy (cpt)
//
// Diverging gradients which are continuous except at
// the centre-point, for emphasis of the sign of the data.
// Here the colour-stops are taken from the diverging
// schemes by Cynthia Brewer.
//
// author: J.J. Green
// copyright: Apache-like
// year: 2004
// url: https://phillips.shef.ac.uk/pub/cpt-city/jjg/polarity
#declare RdGy =
color_map {
  [0.00000 color rgbf <0.4039,0.0000,0.1216,0.0000>]
  [0.12500 color rgbf <0.6980,0.0941,0.1686,0.0000>]
  [0.25000 color rgbf <0.8392,0.3765,0.3020,0.0000>]
  [0.37500 color rgbf <0.9569,0.6471,0.5098,0.0000>]
  [0.50000 color rgbf <0.9922,0.8588,0.7804,0.0000>]
  [0.50000 color rgbf <0.8784,0.8784,0.8784,0.0000>]
  [0.62500 color rgbf <0.7294,0.7294,0.7294,0.0000>]
  [0.75000 color rgbf <0.5294,0.5294,0.5294,0.0000>]
  [0.87500 color rgbf <0.3020,0.3020,0.3020,0.0000>]
  [1.00000 color rgbf <0.1020,0.1020,0.1020,0.0000>]
}