Is my input uploaded?

No. This website tool runs in your browser. Only the optional public API version sends input to the authenticated API route.

Can I use this in an application?

Yes. The Developers documentation lists the authenticated endpoint, request parameters and response example.

Should I verify the result?

Yes. Deterministic tools are designed for repeatable results, but format-specific or heuristic output should still be checked for your use case.

CSS & Design

Color Similarity Calculator

Compare two RGB hex colors using normalized Euclidean distance and a percentage score.

Free foreverRuns in your browserNo sign-up

First hex colorSecond hex color

Result

Enter your values and select compare colors.

About the Color Similarity Calculator

Color Similarity Calculator is a focused browser-based utility. Compare two RGB hex colors using normalized Euclidean distance and a percentage score.

The calculation runs locally in your browser, so the supplied value is not uploaded to ToolsOnDuty. The same capability is also available through the authenticated developer API.

Key features

Fast local processing with explicit validation
Copy-ready structured result
No account, upload or paid data provider required

How to use

1Enter two 3- or 6-digit hex colors.
2Choose any available conversion or formatting options.
3Run the tool and review their RGB distance and similarity percentage.

Examples

Color Similarity Calculator example

Input: two 3- or 6-digit hex colors

Output: their RGB distance and similarity percentage

Frequently asked questions

Is my input uploaded?: No. This website tool runs in your browser. Only the optional public API version sends input to the authenticated API route.
Can I use this in an application?: Yes. The Developers documentation lists the authenticated endpoint, request parameters and response example.
Should I verify the result?: Yes. Deterministic tools are designed for repeatable results, but format-specific or heuristic output should still be checked for your use case.