Bug 8107 bracket hightlighting: can't change color
the color changing option in the preference page seems to be always disabled
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/JavaEditorPreferencePage.java
addTextField(contentAssistComposite, label, ContentAssistPreference.AUTOACTIVATION_TRIGGERS_JAVADOC, 25, 0);
				
		label= "&Background for completion proposals:";
		addColorButton(contentAssistComposite, label, ContentAssistPreference.PROPOSALS_BACKGROUND, 0);
		
		label= "&Foreground for completion proposals:";
		addColorButton(contentAssistComposite, label, ContentAssistPreference.PROPOSALS_FOREGROUND, 0);
		
		label= "Bac&kground for method parameters:";
		addColorButton(contentAssistComposite, label, ContentAssistPreference.PARAMETERS_BACKGROUND, 0);
		
		label= "Fo&reground for method parameters:";
		addColorButton(contentAssistComposite, label, ContentAssistPreference.PARAMETERS_FOREGROUND, 0);
				
		return contentAssistComposite;
	}
	/*
	 * @see PreferencePage#createContents(Composite)
	 */
	protected Control createContents(Composite parent) {
		
		fOverlayStore.load();
		fOverlayStore.start();
		
		TabFolder folder= new TabFolder(parent, SWT.NONE);
		folder.setLayout(new TabFolderLayout());	
		folder.setLayoutData(new GridData(GridData.FILL_BOTH));
		
		TabItem item= new TabItem(folder, SWT.NONE);
		item.setText("&General");