O button (blood type) Emoji

Symbols

A bold, white letter 'O' encased in a bright red square. This character is modeled after the graphical style of Japanese blood type indicator icons.

Usage Context

While it is primarily used in Japan to denote someone's blood type, the rest of the world typically uses it to represent the letter 'O' or as a stand-in for the word 'Oxygen' in scientific or medical contexts. It is frequently paired with other blood type markers like 🅰, 🅱, or 🆎 to share personal health information or medical IDs.

History

This symbol was officially added to the Unicode standard in 2010 as part of the initial emoji set. It originates from early Japanese mobile messaging services where categorizing blood types—a common personality indicator in Japanese culture—was a standard feature of digital profiles.

Details

Glyph

🅾

Unicode

U+1F17E

Shortcode

:emoji_u1f17e:

HTML Entity

&#xD83C;&#xDD7E;

Specifications

Vendor Twitter/X

Category Symbols

Subcategory alphanum

Unicode Version 6.0

Emoji Version 1.0

License CC-BY 4.0

Twemoji Attribution

Emoji graphics by Twitter/X, licensed under CC-BY 4.0

Twemoji graphics are licensed under CC-BY 4.0. You must provide appropriate credit when redistributing or modifying these assets.

CC-BY 4.0 License Twemoji Repository