HTML Entity for Uppercase C Reverse (Ɔ)

Beginner
5 min read
Updated: Sep 2026
1 example
Unicode U+0186
HTML Entity for Uppercase C Reverse / Open O (U+0186) tutorial illustration
Definition

What Is the Uppercase C Reverse Entity?

Uppercase C Reverse (Ɔ) is the Latin Extended-B character at Unicode U+0186 (LATIN CAPITAL LETTER OPEN O). There is no named HTML entity. Use hex or decimal codes for African orthographies and phonetic notation that need open O.

Remember
Character     Ɔ
Unicode       U+0186
Named entity  (none)
Hex entity    Ɔ
Decimal       Ɔ
CSS escape    \0186
Not the same  C · O · ɔ (lowercase) · ©

Hex, decimal, CSS, and a typed character all produce the same glyph: Ɔ. Prefer Ɔ in HTML markup. For related letters see uppercase C hook and uppercase C stretched.

Reference

Quick Reference

One table for every form you will actually use.

FormCodeWhere it goes
Hex entityƆHTML markup (best default)
Decimal entityƆHTML markup
CSS escape\0186Stylesheet content
Direct characterƆUTF-8 HTML text
Named entityNoneUse hex or decimal instead

When to Use Which

SituationUse
Capital open O (C reverse)Ɔ or Ɔ
Numeric-only markupƆ or Ɔ
Generated text via ::before / ::aftercontent: "\0186"
Plain capital C or OType C (U+0043) or O (U+004F)
Lowercase open oUse ɔ (U+0254)
See it

Live Preview

Open O in linguistic context, compared with C, O, and lowercase.

Case pair Case pair: Ɔ / ɔ
Large glyph Ɔ
Hex entity Ɔ → Ɔ
vs look-alikes Ɔ  |  C  |  O  |  ɔ
With entities Hex: Ɔ | Decimal: Ɔ
Code

Complete HTML Example

One page that shows Uppercase C Reverse with hex, decimal, CSS escape, and a typed character. Use View Output or open the live editor.

Hex + Decimal + CSS + Typed

Four ways to display Ɔ in HTML and CSS (no named entity).

html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Uppercase C Reverse (Ɔ)</title>
  <style>
    #point::after {
      content: "\0186";
    }
  </style>
</head>
<body>
  <p>Built with Hex: &#x0186;</p>
  <p>Built with Decimal: &#390;</p>
  <p id="point">Built with CSS: </p>
  <p>Typed: Ɔ</p>
  <p>Case pair: &#x0186; / &#x0254;</p>
</body>
</html>
Try It Yourself

How It Works

1. Hex: &#x0186; inserts Unicode U+0186 → Ɔ. Prefer this when there is no named entity.

2. Decimal: same code point as 390 → &#390;. Same visual as hex.

3. CSS: use \0186 in content (not an HTML entity). #point::after appends Ɔ.

4. Typed: paste Ɔ in a UTF-8 document, or write Case pair: &#x0186; / &#x0254;.

Pitfalls & Tips

Common mistakes when working with Uppercase C Reverse.

Named

No named entity

Do not invent names like &openO;. Use &#x0186; or &#390; only.

Look-alikes

Ɔ ≠ C ≠ O ≠ ©

Open O is &#x0186;. Plain letters are C / O. Copyright is &copy;. Match the orthography you need.

Name

“C reverse” = open O

Unicode calls this open O. The site slug says “C reverse” because the glyph resembles a reversed C.

Fonts

Glyph coverage

Latin Extended-B coverage varies. Prefer fonts with linguistic / African-script support and test on mobile.

CSS vs HTML

Do not mix escapes

\0186 belongs in CSS. &#x0186; / &#390; belong in HTML. Keep the leading zeros in \0186.

Semicolon

End references

Always finish with ; — write &#x0186;, not &#x0186.

Compatibility

Browser Support

Uppercase C Reverse (U+0186) and its entity forms (&#x0186;, &#390;, CSS \\0186) are supported in all modern browsers. Glyph coverage depends on the font.

✓ Universal encoding

Uppercase C Reverse (&#x0186;)

Encode with hex, decimal, or CSS escape — or type Ɔ directly in UTF-8 HTML. Prefer &#x0186;. No named entity exists.

100% Browser coverage
Google Chrome Supported
Yes
Microsoft Edge Supported
Yes
Mozilla Firefox Supported
Yes
Apple Safari Supported
Yes
Opera Supported
Yes
Internet Explorer IE 9+
Yes*
U+0186 Full support

Bottom line: Prefer &#x0186; for readable HTML. Use \\0186 only inside CSS content. Do not confuse with plain C, O, or &copy;.

Remember

Key Takeaways

  • Unicode: this symbol is U+0186 (decimal 390) — Latin capital letter open O.
  • HTML: use &#x0186; or &#390; — there is no named entity.
  • CSS: use \0186 inside content for generated linguistic text.
  • Watch out: not the same as plain C, O, lowercase ɔ, or &copy;.

One line: U+0186 → &#x0186; / &#390; / CSS \0186 (no named entity).

Frequently Asked Questions

Use &#x0186; (hex), &#390; (decimal), or the CSS escape \0186 in the content property. All render Ɔ. Prefer &#x0186; for readable markup. There is no named HTML entity.
U+0186 (LATIN CAPITAL LETTER OPEN O). Hex 0186, decimal 390. It belongs to Latin Extended-B (U+0180–U+024F). There is no named HTML entity.
No. HTML5 does not define a named entity for U+0186. Use &#x0186; or &#390; instead.
This site’s slug uses “C reverse” because the glyph looks like a reversed C / open O. Unicode’s official name is LATIN CAPITAL LETTER OPEN O — the same character.
U+0186 is capital open O. Plain C is U+0043 and plain O is U+004F. U+0254 is the lowercase open o (case pair).
HTML entities (&#390; or &#x0186;) go in markup. The CSS escape \0186 is used in stylesheets (usually in the content property of ::before/::after). Both render Ɔ.

Did you know?

Uppercase C Reverse is Unicode U+0186 (decimal 390) — glyph Ɔ (LATIN CAPITAL LETTER OPEN O) in Latin Extended-B. There is no named HTML entity — use &#x0186; or &#390;. The site name says “C reverse,” but Unicode names it open O (a reversed/open capital O). Do not confuse it with plain C, O, or copyright &copy;.

Next: Uppercase C Stretched

Learn the HTML entity for stretched C — next in this sequence.

Continue tutorial →

About the author

Mari Selvan M P
Mari Selvan M P 🔗

Developer, cloud engineer, and technical writer

  • Experience 12 years building web and cloud systems
  • Focus Full Stack Development, AWS, and Developer Education

I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

AWS Certified Developer – Associate (Credly)

8 people found this page helpful

HTML Entity | Uppercase C Hook HTML Entity | Uppercase C Stretched