Articles, videos, and tools that I've found helpful in establishing a framework for accessible design.
Contrast Figma Plugin to easily check if your design elements pass contrast guidelines
AXE Chrome Extension to do accessibility testing
Device Mode on Chrome to see how interfaces look on different devices
Hemingway App to check that content is easy to understand
ChromeVox, an interface navigation Chrome Extension used by people who are blind or visually impaired
Contrast App to check contrast levels
WW3 Requirements to read about the standard recommendations