WCAG 1.4.3
Level AA
Perceivable
1.4.3 Contrast (Minimum)
Text has a contrast ratio of at least 4.5:1 (3:1 for large text of 18pt/14pt bold).
What 1.4.3 Contrast (Minimum) means
People with low vision can read text against its background.
How to test
Measure text/background contrast with a contrast checker; large text needs 3:1, normal text 4.5:1.
How to meet it
Darken text or lighten backgrounds until ratios pass; never place light-grey text on white.
Need help meeting 1.4.3?
Our IAAP-certified team audits your website and apps against every WCAG 2.2 criterion and delivers code-level remediation.
Official reference: Understanding 1.4.3 Contrast (Minimum) (W3C)
More Perceivable criteria
1.1.1 Non-text Content
1.2.1 Audio-only and Video-only (Prerecorded)
1.2.2 Captions (Prerecorded)
1.2.3 Audio Description or Media Alternative (Prerecorded)
1.2.4 Captions (Live)
1.2.5 Audio Description (Prerecorded)
1.3.1 Info and Relationships
1.3.2 Meaningful Sequence
1.3.3 Sensory Characteristics
1.3.4 Orientation
1.3.5 Identify Input Purpose
1.4.1 Use of Color
1.4.2 Audio Control
1.4.4 Resize Text
1.4.5 Images of Text
1.4.10 Reflow
1.4.11 Non-text Contrast
1.4.12 Text Spacing
1.4.13 Content on Hover or Focus