Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Legibility
- The visual clarity with which individual characters, words, and blocks of text can be distinguished and recognised. Legibility is influenced by font choice (sans-serif fonts are generally more legible on screen), font size (minimum 12px recommended for dyslexic users), letter…
- Luminance(also: Relative Luminance)
- The relative brightness of a color as perceived by the human eye, measured on a scale from 0 (black) to 1 (white). In accessibility, relative luminance is the foundation of WCAG color contrast ratio calculations, which compare the luminance of foreground text against its…
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