O Button (blood Type)

Applies to every emoji in this Unicode subgroup, not only this one.

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Unicode name

NEGATIVE SQUARED LATIN CAPITAL LETTER O

CLDR short name

O button (blood type)

Codepoint

U+1F17E U+FE0F

Hex

1F17E FE0F

Emoji version

0.6

Unicode version

6.0

First released

2010

Unicode group

Symbols

Unicode subgroup

alphanum

Status

Recommended for General Interchange (RGI)

Data verified 2026-10-21 · Unicode Emoji 16.0 · How this data is built

Note: PNG and WebP use the emoji font installed on your device (Apple Color Emoji on macOS/iOS, Segoe UI Emoji on Windows, Noto Color Emoji on Android/Linux), so the look matches your platform. SVG embeds the character as text — rendering depends on the viewer.

Questions people ask

What does the 🅾️ o button (blood type) emoji mean?

🅾️ is the o button (blood type) emoji, part of Unicode's Symbols group, added in Emoji 0.6 (2010).

What is the Unicode codepoint for 🅾️?

U+1F17E U+FE0F: the character U+1F17E (NEGATIVE SQUARED LATIN CAPITAL LETTER O) followed by U+FE0F, variation selector-16, which asks for the colour emoji form. Without U+FE0F many systems draw U+1F17E as a plain text symbol.

When was the 🅾️ o button (blood type) emoji released?

It was added in Emoji 0.6, published in 2010, alongside Unicode 6.0. Phones and computers show it once their system software supports that version; older devices may show an empty box instead.

How do I type 🅾️ on my phone or computer?

On iPhone or Android, open the emoji keyboard and search for “o button (blood type)”. On Windows, press Windows key + . (full stop); on a Mac, press Control + Command + Space, then search for the same word. You can also copy 🅾️ from this page with one click.

What is the shortcode for 🅾️?

On GitHub, type :o2: and it turns into 🅾️ — that code comes from GitHub's own emoji list. Slack, Discord and other apps keep their own shortcode lists; many codes match GitHub's, but check the app's emoji picker to be sure.