Advanced – Usability & Accessibility
Color Contrast Testing – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
Testing that verifies text and interactive elements meet WCAG contrast ratio requirements against their background.
In simple words
Checking that text stands out enough from its background to be readable.
Exam tip
WCAG AA requires 4.5:1 for normal text and 3:1 for large text.
Related terms
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