Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
Search results
- Captioning(also: Captions, Closed captions, Subtitles for the deaf and hard of hearing)
- The conversion of spoken dialogue, sound effects, and other auditory information into synchronised text displayed alongside audiovisual content. Captioning makes audio content accessible to people who are deaf or hard of hearing and also benefits people in noisy environments,…
- Colour blindness(also: Color blindness, Colour vision deficiency, CVD)
- A condition affecting the perception of colour, caused by absent or altered photoreceptors in the retina. The main types are classified by which colour receptors are affected: protanopia (absent red receptors), deuteranopia (absent green receptors), and tritanopia (absent blue…
- Colour contrast ratio(also: Contrast ratio, Luminance contrast ratio, Color contrast)
- A numerical measure of the perceived brightness difference between a foreground colour (typically text) and its background, expressed as a ratio ranging from 1:1 (no contrast, identical colours) to 21:1 (maximum contrast, black on white). WCAG defines minimum contrast ratios to…
3 results.