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How to Check Contrast Online

Step-by-step instructions to check text-to-background contrast for wcag compliance with ZiaSign.

Why this workflow matters

ZiaSign's contrast checker analyzes text-to-background color contrast ratios throughout your PDF. Verify WCAG AA and AAA compliance. Identify low-contrast text that may be difficult to read for users with low vision.

Step by step

Check Contrast is one of the fastest ways to check text-to-background contrast for wcag compliance. Pro access gives you the full workflow.

  1. 1

    Upload your PDF

  2. 2

    Contrast ratios are analyzed

  3. 3

    View the WCAG compliance report

Frequently asked questions

What contrast ratio is required?

WCAG AA requires 4.5:1 for normal text and 3:1 for large text.

What is WCAG AAA?

WCAG AAA is the highest accessibility level, requiring 7:1 for normal text and 4.5:1 for large text. AA is the minimum standard.

Does low contrast affect all users?

Yes. Low contrast text is harder to read for everyone, especially users with low vision, color blindness, or in bright lighting conditions.

How do I fix contrast issues?

Increase the difference between text and background colors. The report shows exact ratios and suggests minimum color adjustments for compliance.

More specific workflows for this tool

Ready to run the actual workflow?

You have the steps. Open the tool, process the file, and then move into the next recommendation if the document still needs cleanup, protection, or conversion.