Tools
WebAIM: This website offers more training for accessibility, as well as a contrast checker to make sure that your color choices match the contrast criteria.
WAVE Tools: This site by WebAIM offers Web Accessibility Evaluation Tools for users to evaluate how accessible your web pages are.
W3C offers a checklist to determine whether your site meets the Success Criteria with its Evaluating Web Accessibility Overview.
Coolors This site offers ways to choose color palettes. They also offer contrast checking and ways to see how colorblind people will view your color choices.
Accessibility.com offers information about accessible fonts.
Laws
Accessibility.com offers an Introduction to Canadian Digital Accessibility Laws to review how to organize your information.
U.S. Web Design Systems presents information about why accessibility is important and links to different resources.
Browsers
Mozilla offers information about how to include accessible markup languages in your website design.
Springshare also offers tips on how to make your LibGuides more accessible.
Google has information about accessibility for web designers and users.