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CSS supports over 140 named colors like "coral," "tomato," and "steelblue" — but matching a specific hex value to the closest of these names by eye is guesswork.
This tool finds the closest standard CSS/X11 named color to any hex color you enter, based on the actual RGB distance between them.
How it works
Enter a hex color. The tool converts it to RGB, then calculates the straight-line (Euclidean) distance in RGB space to every standard named color, returning whichever name is closest.
- Enter hex color.
- Click Calculate to see your results.
Examples
A coral-ish custom color
#FF6F61 is closest to the named color "Coral" (#FF7F50), even though it's not an exact match.
Who should use it
- Finding a human-readable name for a specific hex color used in a design.
- Quickly identifying which standard named color a custom brand color most resembles.
Industry applications
- Web design and front-end development
- Graphic design and branding
Advantages
- Covers a wide set of standard CSS/X11 named colors.
- Includes a complete, formula-based step-by-step explanation of the distance calculation.
Limitations
- Euclidean RGB distance is a simple approximation, not a perceptually-accurate color-matching model.
Common mistakes to avoid
- Assuming the returned name is an exact match without checking the "exact match" indicator.
- Expecting perceptually accurate color naming — Euclidean RGB distance is a simple, common approach but isn't perfectly aligned with human color perception.
Best practices
- Check whether the result is flagged as an exact match before using the name as if it were the precise color.
Tips
- If you need the exact color (not an approximation) in your CSS, just use the hex value directly — named colors are a convenience for common colors, not a requirement.