Calculator
Color Contrast Checker
Check foreground and background color contrast for readable interfaces and accessible UI states.
Features
- Processes input on the Go server and returns a server-rendered result.
- Uses a focused tool page with readable explanatory content.
- Returns output in a copy-friendly text format.
Use Cases
- Run quick calculations without opening a spreadsheet.
- Check values while writing documentation, estimates, or examples.
- Use a stable server-rendered URL for repeatable workflows.
Examples
Example
Fill in the fields and submit the form.
The result appears as copy-friendly text.
FAQ
Is this page server-rendered?
Yes. The tool page and result are rendered by Go, so the page remains accessible and indexable.
Should I paste sensitive data?
Avoid pasting secrets, private keys, passwords, or sensitive personal data into online tools.