static Color blendMultipleColors(LPair<Color, Double> colors) {
  double sum = doubleSum(pairsB(colors))*255;
  double r = 0, g = 0, b = 0;
  
  for (color, weight : unpair colors) {
    r += color.getRed()*weight;
    g += color.getGreen()*weight;
    b += color.getBlue()*weight;
  }
  
  ret new Color(
    (float) clampZeroToOne(doubleRatio(r, sum)),
    (float) clampZeroToOne(doubleRatio(g, sum)),
    (float) clampZeroToOne(doubleRatio(b, sum)));
}

Began life as a copy of #1007920