diff --git a/Elwig/Windows/ChartWindow.xaml.cs b/Elwig/Windows/ChartWindow.xaml.cs
index 3945d89..467e4b8 100644
--- a/Elwig/Windows/ChartWindow.xaml.cs
+++ b/Elwig/Windows/ChartWindow.xaml.cs
@@ -19,6 +19,9 @@ using ScottPlot.Plottable;
 namespace Elwig.Windows {
     public partial class ChartWindow : ContextWindow {
 
+        public static readonly Color ColorUngebunden = Color.Blue;
+        public static readonly Color ColorGebunden = Color.Gold;
+
         public readonly int Year;
         public readonly int AvNr;
         private readonly PaymentVar PaymentVar;
@@ -132,14 +135,14 @@ namespace Elwig.Windows {
         private void InitPlot() {
             if (SelectedGraphEntry?.GebundenGraph != null) {
                 GebundenPlot = OechslePricePlot.Plot.AddScatter(SelectedGraphEntry.GebundenGraph.DataX, SelectedGraphEntry.GebundenGraph.DataY);
-                GebundenPlot.LineColor = Color.Green;
-                GebundenPlot.MarkerColor = Color.Green;
+                GebundenPlot.LineColor = ColorGebunden;
+                GebundenPlot.MarkerColor = ColorGebunden;
                 GebundenPlot.MarkerSize = 9;
             }
 
             DataPlot = OechslePricePlot.Plot.AddScatter(SelectedGraphEntry!.DataGraph.DataX, SelectedGraphEntry!.DataGraph.DataY);
-            DataPlot.LineColor = Color.Blue;
-            DataPlot.MarkerColor = Color.Blue;
+            DataPlot.LineColor = ColorUngebunden;
+            DataPlot.MarkerColor = ColorUngebunden;
             DataPlot.MarkerSize = 9;
 
             if (SelectedGraphEntry?.GebundenGraph == null) {
@@ -327,7 +330,7 @@ namespace Elwig.Windows {
 
         private void PriceInput_TextChanged(object sender, TextChangedEventArgs evt) {
             if (PrimaryMarkedPoint != -1 && ActiveGraph != null) {
-                bool success = Double.TryParse(PriceInput.Text, out double price);
+                bool success = double.TryParse(PriceInput.Text, out double price);
 
                 if (success) {
                     ActiveGraph.SetPriceAt(PrimaryMarkedPoint, price);