This document provides information and resources for verifying that the content of your KB documents is accessible for your end users.
WAVE is a free web-based tool that can be used to scan an entire page and identify possible accessibility issues. Additionally, it provides useful information for understanding how your document structure (e.g. elements like headings) relates to accessibility.
WebAIM's Color Contrast Checker is helpful for verifying that text and background colors have sufficient contrast for users with visual impairments.
These A11Y "Nutrition Cards" for Accessible Components provide a handy reference if you are creating more advanced content that includes interactive elements such as accordions or buttons.
If you are aware of other free and useful resources for accessibility checking that you would like to see added to this list, please send your suggestions to firstname.lastname@example.org!