Accessibility Testing
Color Contrast
Color blindness affects 1 in 12 men and 1 in 200 women. Make sure to check the color contrast of the content in the document. The WCAG guidelines require a color contrast ratio of 4.5:1. You can use different tools to check the color contrast between the background and foreground.
WebAIM
WebAIM provides a free color contrast checker tool. Learn how to use the color contrast checkers on the accessible content page.
Accessibility Checker
Google Slides does not have a built-in accessibility checker. You can use the Grackle Slides add-on to run the accessibility tests on your presentation. Learn how to install Grackle Slides.
Once you have installed Grackle Slides, follow these steps to run the accessibility checker:
- Go to Add-ons > Grackle Slides > Launch.
- Grackle Slides will run the accessibility tests, and a panel will appear showing passed and failed tests.
- You can click on each failed test to view the details of the issue and how to fix it.
- Go through the list and fix the accessibility issues.
Manual Testing
Accessibility checkers do not cover all the accessibility issues. You will still need to check the following issues manually:
- Valid alt text: make sure the alt text conveys the meaning of the content
- Valid hyperlinks: make sure the hyperlinks are correct by testing and following the link to be sure the page you are linking to is still valid
- Text in images: make sure the images do not include text except for a logo. If you do not have a choice, add all the text as alt text and display it on the screen
- Color contrast
- Slide Layouts
- Tables, Charts, and Graphs
- Alternative Text
- Accessibility Testing
- Grackle Slides Installation