Use concrete number of grid regions

Author: pjaap

src/colors.jl

@@ -15,7 +15,7 @@ RGB{Float64}(0.85,0.6,0.6)
 
 """
 function region_cmap(n)
-    ColorSchemes.distinguishable_colors(max(5, n),
+    ColorSchemes.distinguishable_colors(n,
                                         [Colors.RGB(0.85, 0.6, 0.6), Colors.RGB(0.6, 0.85, 0.6), Colors.RGB(0.6, 0.6, 0.85)];
                                         lchoices = range(70; stop = 80, length = 5),
                                         cchoices = range(25; stop = 65, length = 15),
@@ -38,7 +38,7 @@ RGB{Float64}(1.0,0.0,0.0)
 
 """
 function bregion_cmap(n)
-    ColorSchemes.distinguishable_colors(max(5, n),
+    ColorSchemes.distinguishable_colors(n,
                                         [Colors.RGB(1.0, 0.0, 0.0), Colors.RGB(0.0, 1.0, 0.0), Colors.RGB(0.0, 0.0, 1.0)];
                                         lchoices = range(50; stop = 75, length = 10),
                                         cchoices = range(75; stop = 100, length = 10),