The O button (blood type) is that big red badge with a crisp white "O"—a shout-out to blood type O straight from Japanese pop culture, where ABO types show up in profiles, dramas, and fan cards. People drop it in bios to flex their type, tag donation posts, or make universal-donor jokes. It also moonlights as a flashy replacement for the letter O in words like B🅾️SS or G🅾️ALS, and sometimes gets cheekily misread as "zero" for nothing/none vibes. Cue vampire jokes, ER memes, and "any O donors here?" calls in community threads.
On Apple devices, it appears as a cherry-crimson rounded square with a subtle gloss, housing a bold, centered, sans‑serif white O. It’s part of the same squad as the A, B, and AB buttons, and it’s unmistakably a letter—not a number, not a red circle. Clean edges, slight depth, strong contrast: very sticker-on-your-phone-case energy.
In texts, it can signal "I’m type O" or shorthand for O‑positive/O‑negative, even though the emoji itself doesn’t specify the +/−. You’ll see it used playfully—"only 🅾️ energy today"—or flirty: "might be your type (🅾️)." Creators use it for punchy visual typography in thumbnails and captions, and health orgs pair it with syringes and hearts during blood drives. It’s a tiny red billboard that says: O squad, assemble.
Definition
Red Blood Type O icon. iEmoji old name: Blood Type O.
Disqus Leave a comment!
Emoji History The emoji code/ image log of changes.
This emoji was part of the proprietary / non-standardized emoji set first introduced by Japanese carriers like Softbank. These emojis became part of the Apple iPhone starting in iOS 2.2 as an unlockable feature on handsets sold in English speaking countries.
In iOS 5 / OSX 10.7, the underlying code that the Apple OS generates for this emoji was changed.
Emoji General Information
Twitter Emoji Popularity (Rank)
1035 of 2393
Apple/iOS Picture
Google Android Picture
Google Hangouts Picture
Twitter.com Picture
LG Emoji Picture
Samsung Emoji Picture
Phantom Open Emoji Picture
Not created yet
ASCII Conversion
"Short Code" Name
:o2:
Keywords
Previous Names:
Negative Squared Latin Capital Letter O O Button (blood Type)
Negative Squared Latin Capitol Letter O
Unicode Category Information
Unicode Category
Enclosed Alphanumeric Supplement
Unicode Range
1F173–1F1FF
Unicode Subcategory
White on Black Squared Latin Letters
Proposed Unicode Information & Notes
Unicode Category
Artifacts
Unicode Subcategory
White on Black Squared Latin Letters
Names & Annotations
NEGATIVE SQUARED LATIN CAPITAL LETTER O = blood type O
Symbol Information
U+1F17E proposed
Proposal Identifier
e-50E
Character Mapping/Crosswalk Notes
DoCoMo
[O]
KDDI
#726 Ｏ型 U+EB28 SJIS-F3E9 JIS-7A6B
Softbank
#421 #old476 O U+E535 SJIS-FBD5
Emoji Character Encoding Data
Emoji Code Version
iOS 5 Code
UTF-8 Unicode Character(s)
🅾
UTF-8 Character Count
1
Character(s) In Input
AppleColorEmoji Font (available in OSX/iOS)
🅾
Decimal HTML Entity
🅾
Hexadecimal HTML Entity
🅾
Hex Code Point(s)
1f17e
Formal Unicode Notation
U+1F17E
Decimal Code Point(s)
127358
UTF-8 Hex (C Syntax)
0xF0 0x9F 0x85 0xBE
UTF-8 Hex Bytes
F0 9F 85 BE
UTF-8 Octal Bytes
360 237 205 276
UTF-16 Hex (C Syntax)
0xD83C 0xDD7E
UTF-16 Hex
d83cdd7e
UTF-16 Dec
55356 56702
UTF-32 Hex (C Syntax)
0x0001F17E
UTF-32 Hex
01F17E
UTF-32 Dec
127358
Python Src
u"\U0001F17E"
PHP Src
"\xf0\x9f\x85\xbe"
C/C++/Java Src
"\uD83C\uDD7E"
Emoji Code Version
iOS 10 - Current
UTF-8 Unicode Character(s)
🅾️
UTF-8 Character Count
2
Character(s) In Input
AppleColorEmoji Font (available in OSX/iOS)
🅾️
Decimal HTML Entity
🅾 ️
Hexadecimal HTML Entity
🅾 ️
Hex Code Point(s)
1f17e, fe0f
Formal Unicode Notation
U+1F17E, U+FE0F
Decimal Code Point(s)
127358, 65039
UTF-8 Hex (C Syntax)
0xF0 0x9F 0x85 0xBE, 0xEF 0xB8 0x8F
UTF-8 Hex Bytes
F0 9F 85 BE, EF B8 8F
UTF-8 Octal Bytes
360 237 205 276, 357 270 217
UTF-16 Hex (C Syntax)
0xD83C 0xDD7E, 0xFE0F
UTF-16 Hex
d83cdd7e, fe0f
UTF-16 Dec
55356 56702, 65039
UTF-32 Hex (C Syntax)
0x0001F17E 0x0000FE0F
UTF-32 Hex
01F17E, FE0F
UTF-32 Dec
127358, 65039
Python Src
u"\U0001F17E\uFE0F"
PHP Src
"\xf0\x9f\x85\xbe\xef\xb8\x8f"
C/C++/Java Src
"\uD83C\uDD7E\uFE0F"
Emoji Character Encoding Data (equivalent or similiar)
