Clear and direct text helps a variety of readers, including those using assistive technology like screen readers and those still learning the language you are posting in.
All images should be accompanied by alt text/image descriptions.
Alt text may be read out to users who use assistive technology, so it’s important to think about the context and what is important to the message you’re trying to convey, rather than just a description. There is no need to describe every single detail of the image, as listening to a long image description via a screen reader can be exhausting. Don’t include irrelevant information, but instead pick out the few key details that help the listener construct a mental image.
Images should not be used to convey textual information.
Instead of using vague terms like ‘click here’, use more descriptive and specific call-to-actions such as ‘sign up to our newsletter’ or ‘visit the accessibility project webpage’.
Avoid using the same link text for different destinations (particular on the same web page).
Video captioning is absolutely necessary for viewers with hearing impairments.
Make sure your videos are captioned either with:
Captions tend to provide only a transcript of spoken dialogue. Descriptive language however denotes the important sights and sounds that are not spoken, and can be an important addition to a video. Important information may be lost on a visually impaired viewer without this descriptive audio.
There are a number of ways to provide descriptions:
For people who are colour-blind, colour contrast is very important. The ideal contrast between a text colour and its background should be at least 4.5 to 1, for normal text. For larger text that ratio decreases, but it increases for smaller text. If you are having difficulty evaluating colour contrasts, there are several tools to assist you in making your page more accessible to users with low vision or colour blindness (see below).
For questions about accessibility and digital communications, please contact the Digital Communications team in PAD: