Look and Feel Customization of the BlackBerry Hybrid Web Container
Customizations you can make to the look and feel include
changing the splash screen, changing the Hybrid App icons and
name, changing the Hybrid App package icons, changing labels
and text, adding support for new languages, and so on.
Using Custom Colors
The comment tag for customizing colors is BLACKBERRY_CUSTOMIZATION_POINT_COLORS. There are a few places where you can change colors.
Using Custom Fonts
The customization tag for customizing fonts is BLACKBERRY_CUSTOMIZATION_POINT_FONTS.