: is the Unicode character COLON, code point U+003A (decimal 58) in the Basic Latin block, added in Unicode 1.1. In HTML write :, and in UTF-8 it is the single byte 3A.
Codes
| Where | How to write it |
|---|---|
| Code point | U+003A |
| Decimal | 58 |
| UTF-8 bytes | 3A |
| UTF-16 (big-endian) | 003A |
| UTF-32 | 0000003A |
| HTML decimal | : |
| HTML hex | : |
| HTML named | : |
| CSS | \3A |
| JavaScript | \u003A |
| JSON | \u003A |
| Python | \u003A |
| Python by name | \N{COLON} |
| Java, C# | \u003A |
| Rust, Swift | \u{3A} |
| Go, C, C++ | \u003A |
| URL (percent-encoded) | %3A |
JavaScript and JSON strings store text as UTF-16, so this character is one code unit long. Python 3 strings count code points, so its length there is 1.
Properties
| Property | Value |
|---|---|
| Name | COLON |
| Code point | U+003A (decimal 58) |
| Block | Basic Latin (U+0000–U+007F) |
| General category | Po: Other punctuation |
| Script | Common |
| Bidirectional class | CS: Common number separator |
| Mirrored in right-to-left text | No |
| First in Unicode version | 1.1 |
Nearby in Basic Latin
- 2 U+0032 Digit Two
- 3 U+0033 Digit Three
- 4 U+0034 Digit Four
- 5 U+0035 Digit Five
- 6 U+0036 Digit Six
- 7 U+0037 Digit Seven
- 8 U+0038 Digit Eight
- 9 U+0039 Digit Nine
- ; U+003B Semicolon
- < U+003C Less-Than Sign
- = U+003D Equals Sign
- > U+003E Greater-Than Sign
- ? U+003F Question Mark
- @ U+0040 Commercial At
- A U+0041 Latin Capital Letter A
- B U+0042 Latin Capital Letter B
All 128 characters: Basic Latin.
Official reference
Questions people ask
- What is the HTML code for :?
- Use the named entity :, or : (decimal) or : (hex).
- What is the UTF-8 encoding of U+003A?
- 3A (hex), 1 byte. In a URL it is %3A.
- How do I write U+003A in JavaScript or Python?
- JavaScript: \u003A. Python: \u003A.
Source
Unicode Character Database 18.0.0 (Unicode License v3); HTML entity names from the WHATWG HTML Standard (CC BY 4.0). The encodings above are computed from the code point and checked against Python's encoders. How the character looks depends on your fonts.
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