What does 🅾️ O Button (Blood Type) mean?
A capital O in a square, representing blood type O. Beyond donation drives and medical chats, it often stands in for the letter O in emoji wordplay, including the hugs in a sign-off like x🅾️x🅾️. O negative blood is widely known as the universal donor type for red cells, so the emoji appears in urgent appeals for donors. It completes the blood-type set with 🅰️, 🅱️ and 🆎.
🅾️ O Button (Blood Type) is an emoji from the Symbols category (letters & word buttons), added in Emoji 0.6 in 2010.
Example messages
🅾️ O Button (Blood Type) on Apple, Google, Microsoft & more
The code is the same everywhere, but every company draws its own artwork. This is how O Button (Blood Type) looks on each platform.
More letters & word buttons emojis
See all 39 →O Button (Blood Type) emoji: questions & answers
How do I copy and paste the O Button (Blood Type) emoji?
Press the Copy button at the top of this page and 🅾️ is copied to your clipboard. Then paste it anywhere with Ctrl+V, Cmd+V or a long press on your phone. In Slack, Discord and GitHub you can also type the shortcode :o2:.
When was the O Button (Blood Type) emoji added?
🅾️ O Button (Blood Type) was added in Emoji 0.6, released in 2010. It is supported on all current versions of iOS, Android, Windows and macOS.
Why does 🅾️ look different on my phone?
Every platform draws its own artwork for O Button (Blood Type). The underlying code (U+1F17E U+FE0F) is the same everywhere, so the person you send it to always gets the same emoji, just in their device’s style. Compare the designs in the platform section above.