Since a library's virtual presence online is as essential as it's physical spaces, self-created online library resources (e.g., LibGuides) and websites need to be checked for web accessibility by individuals with disabilities.
Web Accessibility in Mind (Web AIM) is a non-for profit organization that began in 1999 with a mission to increase awareness of web accessibility. Web AIM.org has created numerous tools such as WAVE, a web accessibility evaluation tool, the Color Contrast Checker, and manual checklists for Web Content Accessibility Guidelines (WCAG 2.0) by the World Wide Web Consortium (W3C) and Section 504 compliance. WebAIM's Introduction to Web Accessibility is a great resource for understanding how people with disabilities use the web, the frustrations they feel when they cannot access the web, and what you can do to make your sites more accessible.