Calculate contrast ratios between text and background colors according to WCAG 2.1 guidelines.
Minimum 4.5:1 ratio required for WCAG AA (small text under 18pt).
Minimum 3.0:1 ratio required for WCAG AA (bold 14pt+ or regular 18pt+).
Minimum 3.0:1 ratio for user interface controls and graphical objects.
Accessibility ensures that digital content can be comfortably read by everyone, including people with visual impairments. Good color contrast is a fundamental part of inclusive design.