Keycap, "Zero" Sign
This is a numeric key, which is depicted as: on a square frame, there is an Arabic numeral "0". This button is commonly used in telephone or mobile phone dial pad. This emoji can be used not only to specify the meaning of entering numbers on the keyboard or dialing telephone numbers, but also to symbolize the initial and new things.
It should be noted that in the Facbook and OpenMoji platforms, the depicted background images are black and gray respectively; Au by KDDI and Docomo platforms display white background frames; The Softbank platform shows a red background picture; As for the background frames of other platforms, they are all designed in blue. In addition, the color of the number "0" also varies from platform to platform. Most platforms display white numbers, some platforms display black numbers, and some platforms display yellow or blue numbers.
