Visua11y is an extension for the Adapt framework. It provides visual accessibility improvements.
- Color profiles (achromatopsia, protanopia, deuteranopia, tritanopia, dyslexia)
- High contrast
- No transparency
- Low brightness
- Invert
- No animations
- No background images
- Font size (small, medium, large)
- Line height (small, medium, large)
- Paragraph spacing (small, medium, large)
- Letter spacing (small, medium, large)
- Word spacing (small, medium, large)
- IE11 cannot apply filters. This means that images and videos will not be transformed in IE11.
- All colour transformations are applied by mathematical shifts. It is therefore important that the course start from AA colour contrast for the algorithms to be applicable.
- Line height, paragraph spacing, letter spacing and word spacing are all ratio based. 1 is the current value, 1.2 is and uplift by 20%, 0.9 would be a shift downwards by 10%.
- Font size medium is the default font size (16px usually), large is 18pt, small is 9pt.
- Invert only inverts brightness, not colour.
- No background images is contingent on alt text.
Version number: 1.0.1 
Framework versions: 5.15+
Author / maintainer: Adapt Core Team with contributors
Accessibility support: WAI AA
Cross-platform coverage: Chrome, Chrome for Android, Firefox (ESR + latest version), Edge, IE11, Safari 12+13 for macOS/iOS/iPadOS, Opera