Closed omega (ɷ) is the Unicode character at U+0277 in the IPA Extensions block. Official name: LATIN SMALL LETTER CLOSED OMEGA. It is used in phonetic and linguistic notation — not as Greek capital omega or the ohm unit.
Remember
Character ɷ
Unicode U+0277
Hex entity ɷ
Decimal ɷ
CSS escape \0277
Named entity (none)
Not the same Ω · Ω · ɶ
Prefer typing ɷ in UTF-8 when phonetic text requires it. Use numeric entities when encoding must be explicit.
Symbol using Hex Code: ɷ
Symbol using HTML Code: ɷ
Symbol using CSS Entity: ɷ
Typed directly: ɷ
How It Works
1. Hex:U+0277 → ɷ in HTML. The browser turns it into ɷ.
2. Decimal: same code point as 631 → ɷ. Same result as hex.
3. CSS: use \0277 in content (not an HTML entity). #point::after appends that ɷ after the paragraph text.
4. Typed: paste ɷ in UTF-8 when the page charset is UTF-8. There is no named entity for this letter.
Pitfalls & Tips
Common mistakes when working with Closed Omega.
Named?
No named entity
HTML5 does not define a named entity for U+0277. Use numeric forms. Ω is Greek U+03A9, not this letter.
Ω
Not Greek omega
Greek capital omega is U+03A9 (Ω). Use it for Greek text, not U+0277.
Ω
Not the ohm sign
Electrical resistance uses Ω (U+2126). Closed omega is a phonetic Latin letter.
ɶ
Not small capital OE
U+0276 (ɶ) is LATIN LETTER SMALL CAPITAL OE — a different IPA character, not the uppercase of U+0277.
CSS vs HTML
Do not mix escapes
\0277 belongs in CSS strings. ɷ / ɷ belong in HTML.
Semicolon
End references
Always finish with ; — write ɷ, not ɷ.
Compatibility
Browser Support
Closed omega (U+0277) and its numeric entity forms (ɷ, ɷ, CSS \\0277) are supported in all mainstream browsers. Glyph availability depends on the font.
✓ Universal support
Closed Omega (ɷ)
Encode with hex, decimal, CSS escape, or type the character — same code point everywhere encoding is supported.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+0277 / entitiesFull support
Bottom line: Prefer a typed ɷ in UTF-8 when possible. Use ɷ or ɷ when encoding must be explicit, and \\0277 only inside CSS content.
Remember
Key Takeaways
Unicode: closed omega is U+0277 (decimal 631) — glyph ɷ.
HTML: use ɷ or ɷ when you need an entity.
CSS: use \0277 inside content for generated text.
Meaning: phonetic Latin letter — not Greek Ω or ohm Ω.
One line:U+0277 → type ɷ, or encode as ɷ / ɷ / CSS \0277.
Frequently Asked Questions
Use ɷ (hex), ɷ (decimal), or the CSS escape \0277 in content. There is no named HTML entity. In UTF-8 you can also type ɷ directly.
U+0277 (LATIN SMALL LETTER CLOSED OMEGA). Hex 0277, decimal 631. It belongs to the IPA Extensions block (U+0250–U+02AF).
No. Use numeric references like ɷ or ɷ when you need an entity form. For Greek capital omega use Ω (U+03A9) instead.
Use it in phonetic and linguistic notation when the source specifies LATIN SMALL LETTER CLOSED OMEGA — not for Greek omega or the ohm resistance symbol.
HTML entities (ɷ or ɷ) go in markup. The CSS escape \0277 goes in stylesheet strings (usually content on ::before/::after).
No. ɷ is U+0277 (closed omega, Latin/IPA). Ω is U+03A9 (Greek capital omega, Ω). Ω is U+2126 (ohm sign, Ω).
🤔
Did you know?
Closed omega is Unicode U+0277 (decimal 631) — LATIN SMALL LETTER CLOSED OMEGA in the IPA Extensions block. HTML5 has no named entity — use ɷ or ɷ. Distinct from Greek Ω (Ω) and the ohm sign Ω (Ω).
