On devices with Android 12 and later, the “dynamic theme” allows you to adjust the appearance of apps (and the operating system) based on the colors of your wallpaper or on individual accent colors. As of Threema 5.1 for Android, this color setting can also be applied to the Threema app.
Set Up the Dynamic Theme
The selected color (scheme) will now be applied to the apps that support the dynamic theme. In Threema, you first have to activate the corresponding option.
Activate Dynamic Colors in Threema
The Threema app now displays the colors set in the system settings.