Guidelines to ensure clear text:
- Black text on a white background is the easiest to read.
- If using colour, use high contrast colours for text and background.
- Good contrast pairings:
- Black or dark blue text on white or yellow background.
- White or yellow text on black or dark blue background.
- Restrict use of coloured text.
- Avoid using colour to assign meaning, unless you are explaining the meaning in your narration.
- Font should be at least 18 point size for videos using PowerPoint slides.
- Images of websites with text should be at least 12 point size.
- If the text is small, considering zooming in, but make sure you narrate the action.
- Avoid crowding text on a slide.
- Opt for standard fonts with medium heaviness.
Other visual accessibility tips:
- If you are narrating visual cues or locations (eg: “click the big red button”) keep in mind that visually impaired users cannot see the screen and provide additional wayfinding options.
- If using graphics, make sure they are large, high-contrast, sharp, and clear.
- If creating a text only screencast, provide an alternative format (eg: a PDF file) that can be read by screen readers.
