Dos and don'ts: Designing for users with low vision

Do

• use good contrasts and a readable font size
• publish all information on web pages (HTML)
• use a combination of colour, shapes and text
• follow a linear, logical layout -and ensure text flows and is visible when text is magnified to 200%
• put buttons and notifications in context

Don't

• use low colour contrasts and small font size
• bury information in downloads
• only use colour to convey meaning
• spread content all over a page -and force user to scroll horizontally when text is magnified to 200%
• separate actions from their context

Fuente: Dos and don'ts on designing for accessibility