/*
  cpt-city: ibcso/ibcso-bath (cpt)

  The bathymetric scheme used by IBCSO: the International Bathymetric
  Chart of the Southern Ocean.

  Arndt, J.E., Schenke, H.-W., Jakobsson, M., Nitsche, F.O., Buys, G.,
  Goleby, B., Rebesco, M., Bohoyo, F., Hong, J., Black, J., Greku, R.,
  Udintsev, G., Barrios, F., Reynoso-Peralta, W., Taisei, M., Wigley, R.
  The International Bathymetric Chart of the Southern Ocean (IBCSO)
  Version 1.0 — A new bathymetric compilation covering circum-Antarctic
  waters, Geophys. Res. Lett. (40), 12, 28 June 2013, pp. 3111-3117

  author: The IBCSO consortium
  copyright: Free to use
  year: 2013
  url: https://phillips.shef.ac.uk/pub/cpt-city/ibcso
*/
linear-gradient(
  0deg,
  rgb( 31,  40,  79)   0.000%,
  rgb( 31,  40,  79)  41.667%,
  rgb( 38,  60, 106)  41.667%,
  rgb( 38,  60, 106)  50.000%,
  rgb( 46,  80, 133)  50.000%,
  rgb( 46,  80, 133)  58.333%,
  rgb( 53,  99, 160)  58.333%,
  rgb( 53,  99, 160)  66.667%,
  rgb( 60, 119, 188)  66.667%,
  rgb( 60, 119, 188)  75.000%,
  rgb( 72, 151, 211)  75.000%,
  rgb( 72, 151, 211)  83.333%,
  rgb( 90, 185, 233)  83.333%,
  rgb( 90, 185, 233)  91.667%,
  rgb( 95, 198, 242)  91.667%,
  rgb( 95, 198, 242)  95.833%,
  rgb(114, 202, 238)  95.833%,
  rgb(114, 202, 238)  97.917%,
  rgb(141, 210, 239)  97.917%,
  rgb(141, 210, 239) 100.000%
);