After seeing the way on Mac OS X Yosemite and the complete design on macOS Mojave, Apple has used the long-awaited dark mode on iPhone and iPad with iOS 13 and iPadOS updates. This feature transforms the focus of the app menus into dark tones, making us attractive in low light conditions because they do not irritate the eye.
Many popular applications have already been modified by developers to give way to blacks and blacks (WhatsApp takes its time). Some even offer opportunities to change the color of the icon
Icons with black background black background
Apple, as you shared Mac Observer, application for registration another type of Apple Music icon on January 3. In honor of the colors of the eighth note, the background of the icon is completely black. This is the one used for the application Apple Music Business
Still waiting for approval, in the description you can read the following:
This edition consists of a black square with round edges with a musical note composed of blue, pink and purple in the center.
The purpose of registering this genre is to cover music production categories and video screens for subscribers; third-party video recording and production services; a music service, that is, the provision of systematic downloadable background music for commercial establishments, public venues and commercial venues through telecommunications networks, computer networks, internet, satellite, radio and wireless networks; music, radio, television and video entertainment services, that is, personalized editing and music editing, audio and video programming; and music streaming services for you.
The media has made an idea of how images can be specially adapted in the darker version of the upcoming iOS version. Knowing that this is an icon for a specific app available in the App Store, It is not yet known if Apple plans to offer this opportunity in the future.