Input file requirements for WCAG 2.0 (Level AA) compliance

To make sure that the input file is compliant with the accessibility standards of the Web Content Accessibility Guidelines (WCAG) 2.0 Level AA, check the following:

WCAG 1.4.3: Minimum contrast
The input file should contain text and images with a minimum contrast of 4.5:1.
WCAG 1.4.5: Images as text
The input file should deliver information through text, rather than images containing text.