// cpt-city: jjg/polarity/BrBG (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 BrBG =
color_map {
  [0.00000 color rgbf <0.3294,0.1882,0.0196,0.0000>]
  [0.12500 color rgbf <0.5490,0.3176,0.0392,0.0000>]
  [0.25000 color rgbf <0.7490,0.5059,0.1765,0.0000>]
  [0.37500 color rgbf <0.8745,0.7608,0.4902,0.0000>]
  [0.50000 color rgbf <0.9647,0.9098,0.7647,0.0000>]
  [0.50000 color rgbf <0.7804,0.9176,0.8980,0.0000>]
  [0.62500 color rgbf <0.5020,0.8039,0.7569,0.0000>]
  [0.75000 color rgbf <0.2078,0.5922,0.5608,0.0000>]
  [0.87500 color rgbf <0.0039,0.4000,0.3686,0.0000>]
  [1.00000 color rgbf <0.0000,0.2353,0.1882,0.0000>]
}