Uppercase O double acute (Ő) is the Unicode character at U+0150 in Latin Extended-A. Official name: LATIN CAPITAL LETTER O WITH DOUBLE ACUTE — a capital O with a double acute accent (˝), essential for correct Hungarian spelling.
Remember
Character Ő
Unicode U+0150
Named entity Ő (capital O)
Hex entity Ő
Decimal Ő
CSS escape \0150
Not the same ő · Ó · Ö
Prefer Ő in HTML markup — the capital O in the name matters. Numeric forms and typing Ő in UTF-8 also work. For the lowercase letter, use ő (ő).
Using Named Entity: Ő
Using Hex Code: Ő
Using HTML Code: Ő
Using CSS Entity: Ő
Typed directly: Ő
Word: Őr
How It Works
1. Named:Ő (capital O) is the clearest HTML form for U+0150. Lowercase ő is a different character (ő).
2. Hex:U+0150 → Ő in HTML. Same glyph as the named entity.
3. Decimal: same code point as 336 → Ő. Same glyph as hex and named.
4. CSS: use \0150 in content (not an HTML entity). #point::after appends that Ő after the paragraph text.
5. Typed / word: paste Ő in UTF-8, or build Hungarian words like Őr with lang="hu".
Pitfalls & Tips
Common mistakes when working with U+0150.
Case
Ő ≠ ő
Ő → Ő (capital). ő → ő (lowercase). Entity names are case-sensitive.
vs Ó
Not a single acute
Ó (Ó) is O with acute. In Hungarian, Ó and Ő are different vowels — do not swap them.
vs Ö
Not a diaeresis
Ö (Ö) is O with diaeresis/umlaut. Double acute Ő is not the same as Ö.
Encoding
Keep UTF-8 declared
Latin Extended-A letters display reliably with <meta charset="UTF-8">. Prefer named entities when the source file encoding is uncertain.
CSS vs HTML
Do not mix escapes
\0150 belongs in CSS strings. Ő / Ő / Ő belong in HTML.
A11y
Use real language context
When Ő appears in Hungarian words, keep surrounding text and lang="hu" so screen readers get useful context.
Compatibility
Browser Support
Uppercase O double acute (U+0150) and its entity forms (Ő, Ő, Ő, CSS \\0150) are supported in all mainstream browsers. Latin Extended-A glyphs are widely available in system fonts.
✓ Universal support
Uppercase O Double Acute (Ő)
Encode with named, 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 ExplorerIE 9+
Yes
U+0150 / ŐFull support
Bottom line: Prefer Ő (capital O) in HTML. Use \\0150 only inside CSS content. Do not confuse with ő (ő), acute Ó, or diaeresis Ö.
Remember
Key Takeaways
Unicode: uppercase O double acute is U+0150 (decimal 336) — glyph Ő.
HTML: prefer Ő (capital O) — also Ő / Ő.
CSS: use \0150 inside content for generated text.
Meaning:Ő is capital double acute — not ő (ő), not Ó (acute), not Ö (diaeresis).
Use Ő (named), Ő (hex), Ő (decimal), type Ő directly in UTF-8, or the CSS escape \0150 in content. Prefer Ő in normal HTML.
U+0150 (LATIN CAPITAL LETTER O WITH DOUBLE ACUTE). Hex 150, decimal 336. It belongs to Latin Extended-A (U+0100–U+017F).
Yes. Use Ő (capital O). Numeric forms Ő and Ő also work. Note: ő (lowercase) is a different letter (ő).
No. Ő is U+0150 (Ő, double acute). Ó is U+00D3 (Ó). Ö is U+00D6 (Ö). In Hungarian each is a distinct vowel.
Use it for Hungarian and other text that needs Ő — not as a substitute for Ó, Ö, or plain O.
HTML entities (Ő, Ő, or Ő) go in markup. The CSS escape \0150 goes in stylesheet strings (usually content on ::before/::after).
🤔
Did you know?
Uppercase O double acute is Unicode U+0150 (decimal 336) — glyph Ő in Latin Extended-A (U+0100–U+017F). HTML5 names it Ő (capital O). Official name: LATIN CAPITAL LETTER O WITH DOUBLE ACUTE. Lowercase is ő (ő, U+0151). Essential in Hungarian — distinct from acute Ó (Ó) and diaeresis Ö (Ö).
