WhatsApp has introduced customizable chat themes and wallpapers, allowing users to personalize their chat experience with colorful bubbles and backgrounds.

For changing the theme of all your chats and channels, go to the Settings menu > Chats > Default chat theme, and select a theme of your preference. For customising each chat individually, tap on the name of the contact at the top of the chat screen (on iOS), or click the three-dot menu (on Android), and select the "Chat theme" option.

WhatsApp is also adding 30 new wallpapers for users to select as their conversation backgrounds. You can set a default theme for all chats or personalize each conversation with a different theme or background image. The chat theme option will be available under Settings > Chats > Default chat theme, making it easy to access for customization.