Principle 1 – Perceivable

Information and user interface components must be presentable to users in ways they can  perceive.

Guideline 1.1 – Text Alternatives. Provide text alternatives for any non-text content so that it can be changed into other forms people need, such as large print, braille, speech symbols, or simpler language.

  • 1.1.1 Non-text Content

Guideline 1.2 – Time-based Media. Provide alternatives for time-based media.

  • 1.2.1 Audio-only and Video-only (Prerecorded) – Level A
  • 1.2.2 Captions (Prerecorded) – Level A
  • 1.2.3 Audio Description or Media Alternative (Prerecorded) – Level A
  • 1.2.4 Captions (Live) – Level AA
  • 1.2.5 Audio Description (Prerecorded) – Level AA
  • 1.2.6 Sign Language (Prerecorded) – Level AAA
  • 1.2.7 Extended Audio Description (Prerecorded) – Level AAA
  • 1.2.8 Media Alternative (Prerecorded) – Level AAA
  • 1.2.9 Audio-only (Live) – Level AAA

Guideline 1.3 – Adaptable. Create content that can be presented in different ways (for example, simpler layout) without losing information or structure.

  • 1.3.1 Info and Relationships – Level A
  • 1.3.2 Meaningful Sequence – Level A
  • 1.3.3 Sensory Characteristics – Level A

Guideline 1.4 – Distinguishable. Make it easier for users to see and hear content including separating foreground from background.

  • 1.4.1 Use of Color – Level A
  • 1.4.2 Audio Control – Level A
  • 1.4.3 Contrast (Minimum) – Level AA
  • 1.4.4 Resize Text – Level AA
  • 1.4.5 Images of Text – Level AA
  • 1.4.6 Contrast (Enhanced) – Level AAA
  • 1.4.7 Low or No Background Audio – Level AAA
  • 1.4.8 Visual Presentation – Level AAA
  • 1.4.9 Images of Text (No Exception) – Level AAA