 fileprivate let sns = Python.import("seaborn")
 
 fileprivate let redPalette = sns.color_palette("Reds", 4)
-fileprivate let bluePalette = sns.color_palette("Blues_d", 4)
+fileprivate let bluePalette = sns.color_palette("Blues_d", 5)
 
 public struct ResultsPlot {
   public let reward: Reward

    axes.plot(x, yMean, label: label, color: color, linewidth: 2)
    axes.fill_between(
      x,
      zip(yMean, yStandardDeviation).map(-),
      zip(yMean, yStandardDeviation).map(+),
      color: color,
      alpha: 0.1,
      linewidth: 0)

      // The following index is used for picking the color for the corresponding lines in the plot.
      let observationIndex: Int = {
        switch observation {
        case .vision: return 2
        case .scent: return 4
        case .visionAndScent: return 0
        }
      }()
