When text contrasts poorly with its background, it makes reading more difficult, especially for people with low vision. The same goes for icons and situations where highlighting is used to draw attention (such as the hover effects on links).| accessibility.huit.harvard.edu
Alternative (Alt) Text is an essential part of making content accessible. When adding images, charts, icons or other graphic elements, alt text should be added to ensure your content will be accessible to all users.| accessibility.huit.harvard.edu