What's new in WhatsApp Messenger 2.25.9.9 • Chat Themes allow you to customize your bubble color and wallpaper. Choose from pre-set themes, new wallpapers, or mix and match. Go to ‘Settings’ > ‘Chats’ > ‘Default chat theme’ to change it everywhere or ‘Chat themes’ in Contact or Group info to change it for a specific chat. These features will roll out over the coming weeks. Thanks for using WhatsApp!