pamhyr: Set axis label color to 'black' instead 'green'.

src/View/Frictions/PlotStricklers.py

@@ -68,11 +68,11 @@ class PlotStricklers(PamhyrPlot):
 
         self.canvas.axes.set_ylabel(
             _translate("MainWindow_reach", "Stricklers"),
-            color='green', fontsize=11
+            color='black', fontsize=11
         )
         self.canvas.axes.set_xlabel(
             _translate("MainWindow_reach", "Kp (m)"),
-            color='green', fontsize=11
+            color='black', fontsize=11
         )
 
         kp = self.data.reach.get_kp()