Example
Valid — rgb(255, 87, 51)
Hex Color Validator
Validate a hex color code and convert it to RGB instantly in your browser. Free online hex color validator — check #RGB, #RGBA, #RRGGBB formats.
Enter the values below, then press Calculate (or press Enter). The calculator updates your results instantly. Try different values to see how your inputs change the outcome.
- Hex color — enter a text value. A typical Hex color would be e.g. #FF5733 or FF5733.
- Review your results — the key output is highlighted, with supporting figures below.
Loading calculator…
Results
Result
| Detail | Value |
|---|---|
| RGB value | |
| Alpha |
What is this calculator for?
Check that a hex color is well-formed and get its equivalent RGB value.
How to Use This Calculator
Enter the values below, then press Calculate (or press Enter). The calculator updates your results instantly. Try different values to see how your inputs change the outcome.
- Hex color — enter a text value. A typical Hex color would be e.g. #FF5733 or FF5733.
- Review your results — the key output is highlighted, with supporting figures below.
What You'll Need
- Hex color
- a text value · required
About This Calculator
Hex colors come in shorthand (3/4 digit) or full (6/8 digit) forms. This validator confirms the digits are valid hex and expands your code to its RGB (and optional alpha) equivalent.
If invalid, it tells you why, so you can quickly fix a stray character or wrong length. Conversion runs entirely in your browser.
Worked Examples
Frequently Asked Questions
Can I omit the leading #?
Yes — the tool accepts both #FF5733 and FF5733. If you include the # it is stripped before validation.
What do the 4 and 8 digit forms mean?
They add an alpha (opacity) channel. #RGBA and #RRGGBBAA are the CSS Color Level 4 formats, which the tool reads and reports as a normalised rgb() with alpha.