Interview frequency: …
Short answer
For AA, the standards require at least 4.5:1 contrast for normal text, 3:1 for large text (18pt or larger, or bold 14pt), and 3:1 for essential graphical interface elements and icons.
Explanation
Color contrast measures the difference in luminance between text and its background. Proper contrast lets people with low vision, older adults, and anyone using a phone in direct sunlight read content clearly without strain. For the higher AAA level, required contrast increases to 7:1 for normal text and 4.5:1 for large text.
Common mistakes
- Using pale gray text on a light white background just because it looks "modern and soft."
- Relying on text over images with uneven lighting without an overlay to ensure stable contrast.