HTML Entity for Double Struck Capital Gamma (ℾ)

Beginner
5 min read
Updated: Sep 2026
1 example
Unicode U+213E
HTML Entity for double-struck capital gamma (U+213E) tutorial illustration
Definition

What Is Double Struck Capital Gamma?

Double-struck capital gamma (ℾ) is the Unicode character at U+213E in the Letterlike Symbols block. Official name: DOUBLE-STRUCK CAPITAL GAMMA (also called blackboard bold capital gamma). It is used in mathematical and scientific notation.

Remember
Character     ℾ
Unicode       U+213E
Hex entity    ℾ
Decimal       ℾ
CSS escape    \213E
Named entity  (none)
Not the same  Γ (Γ) · ℽ

Prefer ℾ or ℾ in HTML (no named form). You can also type ℾ in UTF-8.

Reference

Quick Reference

One table for every form you will actually use.

FormCodeWhere it goes
Named entityNone—
Hex entityℾHTML markup (preferred)
Decimal entityℾHTML markup
Direct characterℾHTML text (UTF-8)
CSS escape\213EStylesheet content
Greek capital gamma (related)Γ (Γ, U+0393)Ordinary Greek letter — not double-struck

When to Use Which

SituationUse
Blackboard-bold / double-struck capital gammaℾ or type ℾ
Ordinary Greek capital gammaΓ (Γ)
Double-struck small gammaℽ (U+213D)
Double-struck capital piℿ (U+213F)
Generated text via ::before / ::aftercontent: "\213E"
See it

Live Preview

Double-struck capital gamma rendered alone and compared with related forms.

Example Set ℾ
Large glyph ℾ
Compared ℾ   Γ   ℽ   ℿ
With entities Hex: ℾ | Decimal: ℾ
Code

Complete HTML Example

One page that shows Double Struck Capital Gamma with hex, decimal, CSS escape, and a typed character. Use View Output or open the live editor.

Hex + Decimal + CSS + Typed

Four ways to produce ℾ, plus a comparison with Greek Γ.

html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Double Struck Capital Gamma (ℾ) in HTML</title>
  <style>
    #point::after {
      content: "\213E";
    }
  </style>
</head>
<body>
  <p>Double Struck Gamma using Hex Code: &#x213E;</p>
  <p>Double Struck Gamma using HTML Code: &#8510;</p>
  <p id="point">Double Struck Gamma using CSS Entity: </p>
  <p>Typed directly: ℾ</p>
  <p>Compared: &#x213E; (double-struck) vs &Gamma; (Greek)</p>
</body>
</html>
Try It Yourself

How It Works

1. Hex: U+213E → &#x213E; in HTML. Preferred when there is no named entity.

2. Decimal: same code point as 8510 → &#8510;. Same result as hex.

3. CSS: use \213E in content (not an HTML entity). #point::after appends that ℾ after the paragraph text.

4. Typed / compared: paste ℾ in UTF-8, or contrast it with &Gamma; (Γ).

Pitfalls & Tips

Common mistakes when working with Double Struck Capital Gamma.

Name

No named entity

There is no HTML5 named entity for U+213E. Use &#x213E; or &#8510;.

Γ

Not &Gamma;

&Gamma; is Greek capital gamma (U+0393). Double-struck capital gamma is a different Letterlike Symbol.

ℽ

Capital vs small

U+213D is double-struck small gamma (ℽ). U+213E is the capital form.

CSS vs HTML

Do not mix escapes

\213E belongs in CSS strings. &#x213E; / &#8510; belong in HTML.

Fonts

Math font coverage

Some fonts omit Letterlike Symbols. Prefer a math-capable font for reliable display of ℾ.

Semicolon

End references

Always finish numeric entities with ; — write &#x213E;, not &#x213E.

Compatibility

Browser Support

Double-struck capital gamma (U+213E) and its entity forms (&#x213E;, &#8510;, CSS \\213E) are supported in all mainstream browsers. Visible glyphs depend on math / Letterlike Symbols font coverage.

✓ Universal support

Double Struck Capital Gamma (&#x213E;)

Encode with hex, decimal, CSS escape, or type the character — same code point everywhere encoding is supported.

100% Browser coverage
Google Chrome Supported
Yes
Microsoft Edge Supported
Yes
Mozilla Firefox Supported
Yes
Apple Safari Supported
Yes
Opera Supported
Yes
Internet Explorer All versions
Yes
U+213E / entities Full support

Bottom line: Prefer &#x213E; in HTML (no named form). Use &#8510; when decimal form is required, and \\213E only inside CSS content.

Remember

Key Takeaways

  • Unicode: double-struck capital gamma is U+213E (decimal 8510) — glyph ℾ.
  • HTML: no named entity — use &#x213E; / &#8510; / type ℾ.
  • CSS: use \213E inside content for generated text.
  • Meaning: ℾ = blackboard-bold capital gamma — not &Gamma;, not ℽ.

One line: U+213E → &#x213E; / &#8510; / CSS \213E / type ℾ.

Frequently Asked Questions

Use &#x213E; (hex), &#8510; (decimal), type ℾ directly in UTF-8, or the CSS escape \213E in content. There is no named HTML entity for U+213E.
U+213E (DOUBLE-STRUCK CAPITAL GAMMA). Hex 213E, decimal 8510. It belongs to the Letterlike Symbols block (U+2100–U+214F).
No. Use numeric forms &#8510; or &#x213E;, or type the character in a UTF-8 document. Greek capital gamma uses &Gamma; (U+0393) — a different character.
Use it in mathematical or scientific text when you need the blackboard-bold / double-struck capital gamma glyph. Prefer &Gamma; for ordinary Greek capital gamma Γ.
HTML entities (&#8510; or &#x213E;) go in markup. The CSS escape \213E goes in stylesheet strings (usually content on ::before/::after).
No. U+213E is double-struck capital gamma ℾ. &Gamma; is Greek capital gamma Γ (U+0393). U+213D is double-struck small gamma ℽ.

Did you know?

Double-struck capital gamma is Unicode U+213E (decimal 8510) — glyph ℾ in the Letterlike Symbols block. There is no HTML5 named entity; use &#x213E; or &#8510;. Also called blackboard bold capital gamma. Do not confuse with Greek capital gamma Γ (&Gamma;, U+0393).

Next: Double Struck Capital Pi

Learn the HTML entity for double-struck capital pi (U+213F).

Double Struck Capital Pi 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.

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