diff --git a/@MyAppColors/MyAppColors.m b/@MyAppColors/MyAppColors.m
index 4604792..55b7ce0 100644
--- a/@MyAppColors/MyAppColors.m
+++ b/@MyAppColors/MyAppColors.m
@@ -1,155 +1,155 @@
 % Set of colors indended to introduce some uniformity in GUIs
 
-classdef MyAppColors
+classdef (Abstract) MyAppColors
 
     methods (Static)
         %% Predefined colors
         % Colors are represented by rgb triplets returned by static methods
         
         function rgb = warning()
             rgb = [0.93, 0.69, 0.13]; % Orange
         end
         
         function rgb = error()
             rgb = [1,0,0]; % Red
         end
         
         % Labview-style lamp indicator colors
         function rgb = lampOn()
             rgb = [0,1,0]; % Bright green
         end
         
         function rgb = lampOff()
             rgb = [0,0.4,0]; % Dark green
         end
         
         % Recolor app according to a new color scheme
         function applyScheme(Obj, scheme)
             persistent init_default default_main_color ...
                 default_label_text_color default_edit_text_color ...
                 default_edit_field_color default_axes_label_color
                     
             if ~exist('scheme', 'var')
                 scheme = 'default';
             end
 
             switch lower(scheme)
                 case 'dark'
                     main_color = [0.18, 0.19,0.57];
                     label_text_color = [1,1,1];
                     edit_text_color = [0,0,0];
                     edit_field_color = [1,1,1];
                     axes_label_color = [0.9,0.9,1];
                 case 'bright'
                     main_color = [1,1,1];
                     label_text_color = [0,0,0.4];
                     edit_text_color = [0,0,0.];
                     edit_field_color = [1,1,1];
                     axes_label_color = [0,0,0];
                 case 'default'
                     if isempty(init_default)
                         
                         % Create invisible components and read their
                         % colors
                         Uf = uifigure('Visible', false);
                         Ef = uieditfield(Uf);
                         Lbl = uilabel(Uf);
                         Ax = axes(Uf);
                         
                         default_main_color = Uf.Color;
                         default_label_text_color = Lbl.FontColor;
                         default_edit_text_color = Ef.FontColor;
                         default_edit_field_color = Ef.BackgroundColor;
                         default_axes_label_color = Ax.XColor;
                         delete(Uf);
                         
                         init_default = false;
                     end
                     
                     main_color = default_main_color;
                     label_text_color = default_label_text_color;
                     edit_text_color = default_edit_text_color;
                     edit_field_color = default_edit_field_color;
                     axes_label_color = default_axes_label_color;
                 otherwise
                     error('Unknown scheme %s', scheme)
             end
 
             if isa(Obj, 'matlab.apps.AppBase')
                 Fig = findFigure(Obj);
                 MyAppColors.applyScheme(Fig, scheme);
                 return
             end 
             
             if ~isprop(Obj, 'Type')
                 return
             end
 
             switch Obj.Type
                 case 'figure'
                     Obj.Color = main_color;
                 case 'uitabgroup'
                     % Nothing to do
                 case 'uitab'
                     Obj.ForegroundColor = edit_text_color;
                     Obj.BackgroundColor = main_color;
                 case 'uibutton'
                     Obj.FontColor = label_text_color;
                     Obj.BackgroundColor = main_color;
                 case 'uistatebutton'
                     Obj.FontColor = label_text_color;
                     Obj.BackgroundColor = main_color;
                 case 'uidropdown'
                     Obj.FontColor = label_text_color;
                     Obj.BackgroundColor = main_color;
                 case 'uieditfield'
                     Obj.FontColor = edit_text_color;
                     Obj.BackgroundColor = edit_field_color;
                 case {'uilabel', 'uicheckbox', 'uiradiobutton'}
                     Obj.FontColor = label_text_color;
                 case 'uilistbox'
                     Obj.FontColor = edit_text_color;
                     Obj.BackgroundColor = edit_field_color;
                 case 'uitextarea'
                     Obj.FontColor = edit_text_color;
                     Obj.BackgroundColor = edit_field_color;
                 case {'uipanel', 'uibuttongroup'}
                     Obj.ForegroundColor = label_text_color;
                     Obj.BackgroundColor = main_color;
                 case 'axes'
                     try
                         
                         % This property is only present in uiaxes
                         Obj.BackgroundColor = main_color;
                     catch
                     end
                     Obj.XColor = axes_label_color;
                     Obj.YColor = axes_label_color;
                     Obj.GridColor = [0.15, 0.15, 0.15];
                 case 'uimenu'
                     Obj.ForegroundColor = edit_text_color;
-                case 'uibuttongroup'
-                    Obj.ForegroundColor = label_text_color;
-                    Obj.BackgroundColor = main_color;
                 case 'uicontrol'
+                    
+                    % The following switch case is for programmatically
+                    % created components
                     switch Obj.Style
                         case {'text', 'pushbutton', 'togglebutton'}
                             Obj.ForegroundColor = label_text_color;
                             Obj.BackgroundColor = main_color;
                         case 'popupmenu'
                             Obj.ForegroundColor = edit_text_color;
                             Obj.BackgroundColor = edit_field_color;
                     end
             end
 
             if isprop(Obj, 'Children')
 
                 % Recolor children
                 for i = 1:length(Obj.Children)
                     MyAppColors.applyScheme(Obj.Children(i), scheme);
                 end
             end
         end
     end
 end