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Register for Web Accessibility Training

All current and future web editors are required to complete our new accessibility training courses. If you have not attended a training, you can register using the link below.

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  • What is Alt Text?

    What is Alt Text?

    Sighted users are most familiar with alt text as what appears in its place when images fail to load​but for those with vision impairments​, it is the text read aloud by screen readers. Without alt text, the user could be missing important information from your page. It's ​crucial that all images used on your pages include this information. Provide clear, detailed descriptions – one succinct sentence illustrating what you want your audience to get from the image will help all page visitors [...]

  • Preventing Dead Links

    Preventing Dead Links

    Did you know that broken links can adversely affect a site’s performance in Google search? Here's how to easily find, fix and prevent dead links in ​three easy steps [...]



Other aspects of web accessibility can be found on the following pages:

Our Web Accessibility Content Creator Guide is a quick reference to help keep your sites accessible.

Content Creator Guide

In-Depth Content Creator Guide

Contrast Ratio 4.5 to 1.

Contrast Checker for Text and Icons

WCAG 2.0 level AA requires a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text.  This means that light text can not be used on a white background.

Large text is defined as 14 point (typically 18.66px) and bold or larger, or 18 point (typically 24px) or larger.

WebAIM, a web accessibility solutions company, has a free online contrast checker.  Simply set the foreground and background colors, and the checker will automatically provide a pass/fail grade.

WebAIM Contrast Checker

Adding Captions to Videos

Add Captions to YouTube Videos

Add Captions to Vimeo Videos


Always caption and/or transcribe prerecorded video to the highest quality possible.  Automated programs typically do not punctuate and articulate what is spoken with 100% accuracy.  Most often, the computer generated captions will require edits.  We ask that you pay close attention to the following:

  • Accuracy - Correctly identify who is speaking; match the dialogue verbatim; convey background sounds to the fullest extent with the captions remaining on screen long enough to be read in full.
  • Readability - Utilize proper spelling, punctuation, grammar and use of capitals in proper nouns and specialized terms.
  • Placement - Captions must be positioned so as not to block other visual content; no overlap, or run-off.  In general, captions are often best suited to run along the bottom of the video.