// Copyright 2002-2015, University of Colorado Boulder

/**
 * Colors that are specific to PhET simulations.
 * Reuse these in sims whenever possible to facilitate uniformity across sims.
 * These should all be instances of scenery.Color, since {Color} can typically be used anywhere but {string} cannot.
 * <p>
 * This is based on the google doc here:
 * http://spreadsheets.google.com/ccc?key=0Ajw3oS4YmCBqdDZzYUhlMksxZ0lfUHZ3bXUzM0JNU3c&hl=en&pli=1#gid=0
 *
 * @author Sam Reid
 * @author Chris Malley (PixelZoom, Inc.)
 */
define( function( require ) {
  'use strict';

  // modules
  var Color = require( 'SCENERY/util/Color' );

  // Colors that are used for one or more things in the color scheme.
  var DARK_GREEN = new Color( 0, 200, 0 );
  var RED_COLORBLIND = new Color( 255, 85, 0 ); // looks good in colorblind tests, typically used in place of 'red'
  var TAN_ORANGE = new Color( 236, 153, 55 );

  return {
    ACCELERATION: Color.GREEN,
    APPLIED_FORCE: TAN_ORANGE,
    ELASTIC_ENERGY: new Color( 153, 51, 102  ),
    FRICTION_FORCE: RED_COLORBLIND,
    GRAVITATIONAL_FORCE: new Color( 50, 130, 215 ),
    HEAT_THERMAL_ENERGY: RED_COLORBLIND,
    IMAGINARY_PART: new Color( 153, 51, 102  ),
    KINETIC_ENERGY: Color.GREEN,
    NET_WORK: DARK_GREEN,
    NORMAL_FORCE: new Color( 255, 235, 0 ),
    POSITION: Color.BLUE,
    POTENTIAL_ENERGY: Color.BLUE,
    REAL_PART: new Color( 255, 153, 0 ),
    RED_COLORBLIND: RED_COLORBLIND,
    TOTAL_ENERGY: TAN_ORANGE,
    TOTAL_FORCE: DARK_GREEN,
    VELOCITY: RED_COLORBLIND,
    WALL_FORCE: new Color( 153, 51, 0 )
  };
} );

@@ -857,16 +857,134 @@
 f 'red'%0A
+  var GREEN_COLORBLIND = new Color( 0, 135, 0 ); // looks good in colorblind tests when used alongside RED_COLORBLIND%0A
   var TA
@@ -1021,16 +1021,16 @@
 , 55 );%0A
-
 %0A  retur
@@ -1135,25 +1135,24 @@
 53, 51, 102 
- 
 ),%0A    FRICT
@@ -1315,17 +1315,16 @@
 51, 102 
- 
 ),%0A    K
@@ -1518,24 +1518,24 @@
 , 153, 0 ),%0A
-
     RED_COLO
@@ -1554,24 +1554,64 @@
 COLORBLIND,%0A
+    GREEN_COLORBLIND: GREEN_COLORBLIND,%0A
     TOTAL_EN

Add GREEN_COLORBLIND to PhetColorScheme, see #187