color Tool100% In-Browser Privacy

Color Contrast Checker from Image

Verify digital accessibility compliance directly from your website screenshots, posters, and graphic mockups. Samples foreground text and background colors to calculate the exact contrast ratio against WCAG 2.1 Level AA and AAA standards for normal and large text.

colorOutput: JSON, PNG

Color Contrast Checker from Image

100% In-Browser Privacy

Choose image or drag and drop here

Supported: JPG, JPEG, PNG, WEBP, SVG • Max file size: 100 MB

Output Format

GEO Overview & Factual Summary

How Pixena Processes Color Contrast Checker from Image

Calculates relative luminance ratios between image pixel pairs against WCAG 2.1 specifications in the browser.

Direct Answer:Sample text and background colors from your design mockup to calculate the exact WCAG contrast ratio and verify AA/AAA compliance.

Processing:In-browser W3C relative luminance formula (L1 + 0.05) / (L2 + 0.05)

Privacy Model:100% Client-Side. Proprietary UI mockups stay confidential.

Max File Size:50 MB

Browser Support:Universal HTML5

AEO Answer Block & Machine-Readable Facts

Key Facts & Definitions

Definition:A digital accessibility auditing tool that calculates the contrast ratio between foreground and background colors according to W3C Web Content Accessibility Guidelines.

Q: What is the minimum WCAG contrast ratio for regular text?A: WCAG 2.1 Level AA requires a minimum contrast ratio of 4.5:1 for normal text (under 18pt) and 3:1 for large text (18pt+ or 14pt bold).

Q: What is required for WCAG Level AAA?A: Level AAA requires an enhanced contrast ratio of 7:1 for normal body text and 4.5:1 for large text.

Step-by-Step Guide

How to Check Color Contrast from an Image

Upload Mockup

Select a screenshot or graphic design file.

Sample Foreground

Click the text or icon with the foreground eyedropper.

Sample Background

Click the surface underneath with the background eyedropper.

Check WCAG Score

Review the contrast ratio (e.g. 5.2:1) and AA/AAA Pass/Fail badges.

Frequently Asked Questions

Frequently Asked Questions about Color Contrast Checker from Image

How do I test contrast between text and a photographic background?

Use the dual eyedropper to click the text color, then click the background directly behind the text to test the contrast ratio.

What if my background is a photo gradient?

Sample both the brightest and darkest points of the background gradient behind the text to ensure the worst-case contrast still passes.

Does this calculate official W3C relative luminance?

Yes, it strictly implements the W3C WCAG 2.1 formula using sRGB gamma correction.

Can I export an accessibility compliance report?

Yes, download a summary card indicating Pass/Fail status for AA Normal, AA Large, AAA Normal, and AAA Large text.

Are my confidential client wireframes uploaded to your server?

No, all sampling and contrast mathematics execute 100% locally in your browser.

Does it suggest color tweaks to achieve compliance?

Yes, if your combination fails, Pixena suggests the closest adjusted shade that satisfies WCAG AA.

Recommended Next Steps In Your Workflow

1Speed Boost

Lossless Image Compression

Shrink final file size by up to 80% without degrading visual clarity.

Continue Workflow

2Perfect Fit

Smart Image Resizer

Scale width and height to exact pixel budgets or aspect ratios.

Continue Workflow

Extract Colors from Image

Extract the full color palette, HEX codes, RGB, and HSL values from any photo.

Color Palette Generator from Image

Generate harmonious 5-color aesthetic palettes from any photo with export to Figma, CSS, and ASE.

Image Color Analyzer

Deep technical analysis of color distribution, RGB histograms, color temperature, and brightness.

Find Dominant Color in Image

Identify the single most prominent dominant color and primary accents with percentage coverage.