Roman Numeral Ten (Ⅹ) is the Unicode character at U+2169 in the Number Forms block. It looks like an uppercase roman X and is used for chapter labels, outlines, and formal numbering.
Remember
Character Ⅹ
Unicode U+2169
Hex entity Ⅹ
Decimal Ⅹ
CSS escape \2169
Named entity (none)
All of these produce the same glyph: Ⅹ. Prefer the Unicode character (or its entities) when you need a true roman numeral; type the letter X when you only need ordinary text.
Reference
Quick Reference
One table for every form you will actually use.
Form
Code
Where it goes
Direct character
Ⅹ
HTML text (UTF-8)
Hex entity
Ⅹ
HTML markup
Decimal entity
Ⅹ
HTML markup
CSS escape
\2169
Stylesheet content
Named entity
—
Not defined in HTML5
When to use which
Situation
Use
Need the roman numeral glyph Ⅹ
Type Ⅹ, or Ⅹ / Ⅹ
Generated text via ::before / ::after
content: "\2169"
Lowercase roman numeral ten
Use ⅹ (U+2179)
Ordinary letter X (not a numeral)
Type X (U+0058)
Looking for &RomanX; or similar
Does not exist — use numeric form
See it
Live Preview
Roman Numeral Ten rendered in common writing contexts.
Inline textChapter Ⅹ — Summary
Large glyphⅩ
OutlineⅨ Prior Ⅹ Current Ⅺ Next
Monospacesection Ⅹ → wrap-up
With entitiesHex: Ⅹ | Decimal: Ⅹ
Code
Complete HTML Example
One page that shows Roman Numeral Ten with the hex entity, decimal entity, CSS escape, and a typed character. Use View Output or open the live editor.
Hex + Decimal + CSS + Typed
All four ways to produce Ⅹ in a single document.
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Roman Numeral Ten (Ⅹ) in HTML</title>
<style>
#point::after {
content: "\2169";
}
</style>
</head>
<body>
<p>Roman Numeral Ten using Hex Code: Ⅹ</p>
<p>Roman Numeral Ten using HTML Code: Ⅹ</p>
<p id="point">Roman Numeral Ten using CSS Entity: </p>
<p>Typed directly: Ⅹ</p>
</body>
</html>
Roman Numeral Ten using Hex Code: Ⅹ
Roman Numeral Ten using HTML Code: Ⅹ
Roman Numeral Ten using CSS Entity: Ⅹ
Typed directly: Ⅹ
How It Works
1. Hex:U+2169 → Ⅹ in HTML. The browser turns it into Ⅹ.
2. Decimal: same code point as 8553 → Ⅹ. Same result as hex.
3. CSS: use \2169 in content (not an HTML entity). #point::after appends that Ⅹ after the paragraph text.
4. Typed Ⅹ: fine in UTF-8 pages. All four lines show the same roman numeral.
Pitfalls & Tips
Common mistakes when working with Roman Numeral Ten entities.
Named?
No named entity
HTML5 does not define &RomanX; or similar. Use numeric forms.
CSS vs HTML
Do not mix escapes
\2169 belongs in CSS. Ⅹ / Ⅹ belong in HTML.
Ⅹ vs X vs ⅹ
Different characters
Ⅹ is U+2169; letter X is U+0058; lowercase ⅹ is U+2179.
Fonts
Check the glyph
Number Forms support varies by font. If Ⅹ is missing, fall back to the letter X or another font.
Semicolon
End references
Always finish with ; — write Ⅹ, not Ⅹ.
Lists
CSS list-style
For auto-numbered roman lists, prefer list-style-type: upper-roman instead of hard-coding Ⅹ.
Compatibility
Browser Support
Roman Numeral Ten (U+2169) and its numeric entity forms (Ⅹ, Ⅹ, CSS \\2169) are supported in all mainstream browsers. Glyph shape depends on the font.
✓ Universal support
Roman Numeral 10 (Ⅹ)
Encode with hex, decimal, or CSS escape — or paste Ⅹ in UTF-8 HTML.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+2169 / entitiesFull support
Bottom line: Use Ⅹ or Ⅹ for the Unicode glyph, and \\2169 only inside CSS content. Prefer the letter X for ordinary text.
Remember
Key Takeaways
Unicode: Roman Numeral Ten is U+2169 (decimal 8553).
HTML: use Ⅹ or Ⅹ when you need an entity.
CSS: use \2169 inside content for generated text.
Default: use Ⅹ for roman chapters; type X for ordinary letters.
One line:U+2169 → Ⅹ / Ⅹ / CSS \2169, or paste Ⅹ.
Frequently Asked Questions
Use Ⅹ (hex), Ⅹ (decimal), or the CSS escape \2169 in the content property. All render Ⅹ. You can also paste Ⅹ directly when your file is UTF-8.
U+2169 (hex 2169, decimal 8553). It belongs to the Number Forms Unicode block.
No. HTML5 does not define a named entity for Ⅹ. Use numeric references like Ⅹ or Ⅹ.
Use it for chapter labels, outlines, and typography that needs a true uppercase roman numeral glyph. For ordinary text, the letter X is usually enough.
No. The Latin letter X is U+0058. Lowercase roman numeral ten is U+2179 (ⅹ). Uppercase roman numeral ten is U+2169 (Ⅹ) — a different character.
HTML entities (Ⅹ or Ⅹ) go in markup. The CSS escape \2169 is used in stylesheets (usually in the content property of ::before/::after). Both render Ⅹ.
🤔
Did you know?
Uppercase roman numeral ten is Unicode U+2169 (decimal 8553). HTML5 has no named entity for it — use Ⅹ or Ⅹ. It is a different character from the letter X (U+0058) and from lowercase roman ⅹ (U+2179).
