Download your preferred theme ZIP file.
Open your file explorer and navigate to your internal storage. Look for a folder named Citra EMU . citra android themes link
Modern versions like Citra Enhanced include built-in support for system-wide dark modes and Material U coloring, which adapts the emulator's UI colors to match your Android wallpaper. System Requirements for Heavy Themes Download your preferred theme ZIP file
Finding a direct "download and install" link for a theme is different from standard Android apps. Themes are usually shared as ZIP files within enthusiast communities: citra android themes link