U+26AA, ⚪
MEDIUM WHITE CIRCLE

[U+26A9]
Miscellaneous Symbols
[U+26AB]
Presentations of ⚪︎
Text
style
Emoji
style
⚪︎ ⚪️
Note: Character's appearance
may be different on each system.
Text style is forced with ︎
and emoji style with ️

Emoji