Site Report

PDF graphics with missing ALT attributes cause problems in:

• NVDA 2021 with Chrome: a meaningless label like 'unlabeled graphic' is voiced.
• NVDA 2021 with Firefox: the image is ignored.
• JAWS 2021 with Chrome: a meaningless label like 'unlabeled graphic' is voiced.
• JAWS 2021 with Firefox: the image is ignored.
• VoiceOver macOS with Safari: a meaningless label like 'image' is voiced.
• VoiceOver iOS with Safari: a meaningless label like 'image' is voiced.

PDF graphics with blank ALT attributes cause problems in:

• NVDA 2021 with Chrome: a meaningless label like 'unlabeled graphic' is voiced.
• NVDA 2021 with Firefox: a meaningless label like 'graphic' is voiced.
• JAWS 2021 with Chrome: a meaningless label like 'unlabeled graphic' is voiced.
• JAWS 2021 with Firefox: a meaningless label like 'graphic' is voiced.
• VoiceOver macOS with Safari: a meaningless label like 'image' is voiced.
• VoiceOver iOS with Safari: a meaningless label like 'image' is voiced.

Impact on users:

• JAWS Reading: Treats tables without th and role as layout tables if the table contains cells above or below certain pixel sizes. This measurement is affected by browser window size, browser font size, and the browser used.
• NVDA Reading: Applies a layout table heuristic to tables without th and role which varies depending on the browser used and on the window size in some circumstances.
• VoiceOver Reading: Uses a sophisticated heuristic on tables without th and role, which is similar (but not identical) to the heuristic used by NVDA with Firefox.

A link name allows screen readers to voice what the links does. If there is no link content, or the link content is hidden by CSS, screen readers have nothing to read, so read out the URL instead. To add a name do one of the following:

• Add text between the a element start and end tags
• Add an aria-label attribute
• Add an aria-labelledby attribute
• Add an img alt attribute labeling the link if it contains an img element

Impact on users:

• VoiceOver macOS 13.6 Safari 16.6 macOS 13.6.0 Reading: Meaningless frame title read out.
• VoiceOver macOS 12.5 Safari 15.6 macOS 12.5.1 Reading: Meaningless frame title read out.
• VoiceOver macOS 11.5 Safari 15.0 macOS 11.5.2 Reading: Meaningless frame title read out.

Some users find it hard to read light gray text on a white background, dark gray text on a black background and white text on a red background.

• The contrast ratio should be 3.0 or more for 18 point text, or larger
• The contrast ratio should be 3.0 or more for 14 point bold text, or larger
• The contrast ratio should be 4.5 or more for all other text

Some users find it hard to read light gray text on a white background, dark gray text on a black background and white text on a red background.

• The contrast ratio should be 4.5 or more for 18 point text, or larger
• The contrast ratio should be 4.5 or more for 14 point bold text, or larger
• The contrast ratio should be 7.0 or more for all other text