static int blendMultipleColorsToInt(LPair<Color, Double> colors) {
  double sum = doubleSum(pairsB(colors));
  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 rgbInt(
    roundedRatio(r, sum),
    roundedRatio(g, sum),
    roundedRatio(b, sum));
}

static int blendMultipleColorsToInt(Color[] colors, double[] weights) {
  double sum = doubleSum(weights);
  double r = 0, g = 0, b = 0;
  
  for i over colors: {
    Color color = colors[i];
    double weight = weights[i];
    r += color.getRed()*weight;
    g += color.getGreen()*weight;
    b += color.getBlue()*weight;
  }
  
  ret rgbInt(
    roundedRatio(r, sum),
    roundedRatio(g, sum),
    roundedRatio(b, sum));
}