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contrast checker
Color tool
Contrast Checker
Color Tools · Visual-first · no code required
Contrast Checker — fast, consistent results via Toolversa.
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Color workspace
Pick colors, then run
Use the color squares for an easy, visual choice — the tool fills in the technical values. You can still paste a HEX code if you already have one.
IMAGE workspace
Input Section
Upload an image, set transformation options, then process it without leaving the page.
Copy ready
Accessible labels
Upload preview
Validation
Required inputs are checked before execution, with inline error messages for missing or invalid values.
Scalability
Each tool runs through the same config-driven workspace, so new tools inherit upload, preview, result, and share patterns automatically.
Trust & transparency
Straightforward expectations for how Contrast Checker fits your workflow.
100% free to use on Toolversa
No signup required for standard use
Built for quick, practical results
Runs with Toolversa server-side logic you trigger
Color values depend on display calibration
Disclaimer: Verify contrast and accessibility (e.g. WCAG) in your real UI context.
Documentation
Contrast Checker
Measure contrast ratio between two colors.
How to use Contrast Checker
- 1 Enter colors.
- 2 Check ratio.
Formula
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Contrast Ratio = (L1 + 0.05) / (L2 + 0.05)
Frequently asked questions
Quick answers to common questions.
WCAG compliant?
Yes.
At a glance
Related tools
More from Color Tools — pick another utility in this collection.