Real Black Wallpaper

The advantages of using a black background on the phone are:
Energy Saving: In phones with AMOLED screen technology, using a black background allows the pixels to be turned off. This helps the screen consume less energy and therefore extend battery life.
Eye Health: Dark mode can reduce eye fatigue and provide a more comfortable reading experience, especially in low light conditions or at night. Aesthetics and Focus: A black background can draw users' attention to the colors and details of applications and content, providing a more focused user experience. However, the effect of a black background on battery life may not always be obvious and may vary from device to device. It's also important to note that your phone must have AMOLED display technology to reap the benefits of a black background.