Did you test normal text?
A large heading is not enough if the UI also contains small copy.
Practical guide
How to check WCAG contrast without guessing whether a color reads well
Learn how to check WCAG contrast between text and background and review AA and AAA without extra friction.
Checklist
Before approving a color pair
Did you review the real background?
A gradient or card background can change the reading result.
Does the button still stand out?
Readability and hierarchy should work together.
Does the wider system stay consistent?
You do not want to fix one pair and break several others.
Main idea
Why it helps to review contrast
It improves readability
Good contrast makes content easier to read with less effort.
It reduces visual mistakes
A color pair can look nice and still fail under real reading conditions.
It improves color decisions
Checking contrast before publishing prevents late fixes in the visual system.
Step by step
How to check WCAG contrast
Pick text and background
Define the two colors you want to compare.
Look at the ratio
That number summarizes the luminance separation between the two tones.
Review AA and AAA
Confirm whether the pair passes for normal and large text.
Adjust if needed
Slight changes in brightness, saturation, or tone can fix the issue.
Common uses
Where contrast review is usually needed
Text on buttons
Helpful for checking whether calls to action remain readable.
Cards and banners
Useful for blocks where the background changes more than a flat color.
Interface palettes
Useful when turning colors into reusable styles.
FAQ
Common questions about WCAG contrast
Do AA and AAA mean the same thing?
No. AAA requires a higher contrast level than AA.
Do normal and large text use the same rule?
No. Large text can pass with a lower ratio.
Is “it looks fine” enough?
No. Visual intuition alone does not replace an actual contrast check.
Do I need to upload a screenshot?
No. You compare the colors directly in the browser.
Keep exploring
Related pages and tools
Check it now
Review WCAG contrast and validate your colors in seconds
The checker shows ratio, AA and AAA levels, and an editable preview.