// cpt-city: jjg/polarity/Spectral (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 Spectral =
color_map {
  [0.00000 color rgbf <0.6196,0.0039,0.2588,0.0000>]
  [0.12500 color rgbf <0.8353,0.2431,0.3098,0.0000>]
  [0.25000 color rgbf <0.9569,0.4275,0.2627,0.0000>]
  [0.37500 color rgbf <0.9922,0.6824,0.3804,0.0000>]
  [0.50000 color rgbf <0.9961,0.8784,0.5451,0.0000>]
  [0.50000 color rgbf <0.9020,0.9608,0.5961,0.0000>]
  [0.62500 color rgbf <0.6706,0.8667,0.6431,0.0000>]
  [0.75000 color rgbf <0.4000,0.7608,0.6471,0.0000>]
  [0.87500 color rgbf <0.1961,0.5333,0.7412,0.0000>]
  [1.00000 color rgbf <0.3686,0.3098,0.6353,0.0000>]
}