HTML Entity for Uppercase O Caron (Ǒ)
What You'll Learn
How to display the uppercase O with caron (Ǒ) in HTML using hexadecimal, decimal, and CSS escape methods. This character is U+01D1 in the Latin Extended-B block. The caron (ˇ) is a diacritical mark used in Pinyin to denote the third tone of Mandarin Chinese and in Czech, Slovak, and other Slavic orthographies.
Render it with Ǒ, Ǒ, or CSS escape \01D1. There is no named HTML entity for this character. In UTF-8 documents you can also type Ǒ directly.
⚡ Quick Reference — Uppercase O Caron Entity
U+01D1Latin Extended-B
ǑHexadecimal reference
ǑDecimal reference
—No named entity
Name Value
──────────── ──────────
Unicode U+01D1
Hex code Ǒ
HTML code Ǒ
Named entity (none)
CSS code \01D1
Meaning Latin capital letter O with caron
Related U+01D2 = ǒ (lowercase)
U+004F = O (plain uppercase)
Block Latin Extended-B (U+0180–U+024F)Complete HTML Example
A simple example showing the uppercase O caron (Ǒ) using hexadecimal code, decimal HTML code, the character directly, and a CSS content escape:
<!DOCTYPE html>
<html>
<head>
<style>
#point:after{
content: "\01D1";
}
</style>
</head>
<body>
<p>Symbol (hex): Ǒ</p>
<p>Symbol (decimal): Ǒ</p>
<p>Symbol (direct): Ǒ</p>
<p id="point">Symbol (CSS): </p>
</body>
</html>🌐 Browser Support
The uppercase O caron (Ǒ) is supported in all modern browsers as part of Latin Extended-B:
👀 Live Preview
See the uppercase O caron (Ǒ) in language and notation contexts:
🧠 How It Works
Hexadecimal Code
Ǒ uses the Unicode hexadecimal value 01D1 to display the character. The x prefix indicates hexadecimal format.
Decimal HTML Code
Ǒ uses the decimal Unicode value 465 to display the same character. A common method when a numeric reference is needed.
Direct Character
Type Ǒ directly in HTML when your document uses UTF-8 encoding. There is no named entity for this extended Latin letter.
CSS Entity
\01D1 is used in CSS stylesheets, particularly in the content property of pseudo-elements like ::before and ::after.
Same visual result
All methods produce the glyph: Ǒ. Unicode U+01D1 sits in Latin Extended-B. Lowercase equivalent: U+01D2 (ǒ). Do not confuse with Ŏ (O breve) or Ó (O acute).
Use Cases
The uppercase O caron (Ǒ) is commonly used in:
Capitalized Pinyin syllables with third-tone marks, such as at the start of a sentence or in proper nouns that require Ǒ.
Part of the caron diacritic family used across Slavic orthographies. Use the correct capital letter when displaying extended Latin text.
Show capitalized headwords, pronunciation guides, or Pinyin transliterations that include Ǒ.
Display correct tone marks in capitalized Chinese (Pinyin) lessons and caron-based spelling in Slavic language courses.
Use in academic papers, textbooks, or documentation on Pinyin, Slavic phonology, and diacritical marks.
Using the correct character (U+01D1) ensures assistive technologies interpret the O with caron correctly.
Using \01D1 in the CSS content property to insert Ǒ via pseudo-elements.
💡 Best Practices
Do
- Serve pages as UTF-8; you can type Ǒ directly in UTF-8 source
- Use numeric references (
ǑorǑ) when escaping is required - Use
\01D1in CSScontentwhen generating the symbol via pseudo-elements - Use fonts that support Latin Extended-B characters (U+0180–U+024F)
- Distinguish Ǒ (caron) from Ŏ (breve) and Ó (acute)
Don’t
- Expect a named HTML entity—none exists for Ǒ
- Confuse Ǒ (caron) with Ŏ (breve), Ó (acute), or plain O
- Substitute plain
Owhen Ǒ is required in capitalized Pinyin tone marks - Put CSS escape
\01D1in HTML text nodes - Use
\001D1in CSS—the correct escape is\01D1
Key Takeaways
Type Ǒ directly, or use hex/decimal references
Ǒ ǑFor CSS stylesheets, use the escape in the content property
\01D1Unicode U+01D1 — LATIN CAPITAL LETTER O WITH CARON
Pinyin and Slavic orthographies; lowercase is ǒ (U+01D2)
Previous: Uppercase O Breve (Ŏ) Next: Uppercase O Center Dot
❓ Frequently Asked Questions
Ǒ (hex), Ǒ (decimal), or \01D1 in CSS content. There is no named HTML entity for Ǒ. In UTF-8 you can also type Ǒ directly.U+01D1 (LATIN CAPITAL LETTER O WITH CARON). Latin Extended-B block. Hex 01D1, decimal 465. Used in Pinyin and Slavic orthographies. Lowercase form is U+01D2 (ǒ).Ǒ or Ǒ, or the CSS entity \01D1. In UTF-8 pages you can type Ǒ directly.Ǒ or Ǒ) is used in HTML content; CSS entity \01D1 is used in stylesheets in the content property of pseudo-elements. Both produce Ǒ.Explore More HTML Entities!
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