Android users may soon have a significant amount of control over the visual identity of their primary texting app. Evidence from a recent beta build suggests that Google Messages customization features are in development, aiming to bring a level of personalization that has long been missing from the platform’s default messaging experience.
For years, Google Messages has prioritized functionality and stability, leaning heavily on the adoption of Rich Communication Services (RCS) to modernize the Android texting experience. Though, while the app excels at delivering high-resolution media and read receipts, its aesthetic options have remained sparse, largely limited to basic bubble color adjustments.
The discovery of new “strings”—the snippets of text used by developers to label buttons and menus—indicates that Google is building a comprehensive “Theme UI.” This system would allow users to move beyond simple color swaps and instead create a fully tailored environment for their conversations.
This shift arrives at a critical juncture for the Android ecosystem. As Samsung begins to phase out its own proprietary messaging app in the U.S. Market, Google Messages has develop into the recommended standard for millions of Galaxy users. By bridging the gap in customization, Google is effectively removing one of the last remaining reasons users might hesitate to make the switch.
A Deep Dive Into the New Customization Strings
The technical evidence for these changes was found within the app’s latest beta code. For those unfamiliar with how app development works, strings are often the first indicator of a feature’s existence before the actual user interface is polished, and deployed. The specific labels found in the code suggest a robust set of tools for visual modification.
Based on the discovered strings, users can expect the following capabilities:
- Custom Backgrounds: The ability to replace the standard chat backdrop with a personalized image or color.
- Photo Integration: Specific strings such as “Upload photo” and “Your photos” suggest that users can pull images directly from their gallery to serve as chat wallpapers.
- Enhanced Bubble Control: While basic colors exist now, “Bubble Color” listed within the “Custom Theme” menu suggests a more integrated approach to matching chat bubbles with the overall theme.
- Theme Previews: A “Theme Preview” function will likely allow users to see how their choices look in a simulated chat before applying them globally.
The presence of a “Theme UI” title suggests that Google is not just adding a few settings, but is instead creating a dedicated menu for personalization. This would bring the app’s flexibility closer to that of third-party messengers like Telegram or WhatsApp, where the visual atmosphere of a chat can be changed on a per-conversation basis.
The Samsung Transition and the RCS Standard
The timing of these updates is likely not coincidental. Samsung Messages is being discontinued in the U.S., pushing users toward Google Messages as the primary alternative. Due to the fact that Google Messages is the most supported app for RCS, it provides the most consistent experience across different Android manufacturers.

However, Samsung users have historically enjoyed a higher degree of visual customization. For many, the ability to set a specific photo as a background for a specific contact was a staple of the Samsung experience. By introducing these features, Google is ensuring that the transition for Samsung users is frictionless, providing the “best of both worlds”: the technical superiority of Google’s RCS implementation and the aesthetic freedom of Samsung’s legacy software.
| Feature | Current Google Messages | Expected Beta Features |
|---|---|---|
| Bubble Colors | Basic selection | Integrated Theme UI colors |
| Chat Backgrounds | Static/System Default | Custom Uploads/Photos |
| Theme Previews | None | Real-time Preview Mode |
| Personalization | Limited | Comprehensive Theme UI |
What This Means for the Android Ecosystem
From a software engineering perspective, adding a theme engine to a messaging app involves more than just changing a background image. It requires the app to dynamically adjust contrast and accessibility colors to ensure that text remains readable regardless of the photo uploaded. The inclusion of a “Theme Preview” suggests Google is mindful of this user experience (UX) challenge.
For the average user, this represents a shift in how Google views its “Core” apps. For a long time, Google’s design philosophy for Android was centered on “Material You,” where the system automatically picks colors based on the user’s wallpaper. While elegant, Material You is passive. The new Google Messages customization features represent a move toward active personalization, giving the user the steering wheel rather than relying on an algorithm.
Timeline and Availability
Because these features were spotted in a beta build, they are not yet available to the general public. Beta builds are used to test stability and squash bugs before a wide release. While Google has not provided an official launch date, the discovery of these strings often precedes a rollout by several weeks or months.

Industry observers are looking toward the next Android “Feature Drop”—the periodic updates Google pushes to Pixel devices and the broader Android ecosystem—as a likely vehicle for these changes. If the features are integrated into a Feature Drop, they could arrive within the next month, though a staggered rollout via the Google Play Store is more common for app-specific updates.
Until then, users can continue to use the basic color customization available in the current stable build of the app. For those eager to test these features, enrolling in the Google Messages Beta program via the Play Store is the only current path to potentially seeing these tools in action.
The next confirmed checkpoint for Android users will be the upcoming official Feature Drop, which typically outlines the next wave of system-level enhancements and app integrations. We will continue to monitor the beta builds for any signs of a final “Apply” trigger for these themes.
Do you prefer the automated look of Material You, or are you looking forward to manually customizing your chat backgrounds? Let us know in the comments below.
