If you interested Usability and UX I’m pretty sure you have heard the name of Jakob Nielsen, and if not, you should. He has a company with Don Norman, another guru in the area, and is called Nielsen Norman Group, which has been a leading voice in the user experience field. I urge you to take a look at their website.
At this time, I want to share with you this ‘Usability Guidelines for Accessible Web Design’ report, which is a must-read for all UX designers and developers. I recommend you to read it and share it with your team.
This report, as they said, presents 75 design guidelines for creating websites for people who use assistive technology for browsing websites. But I think these guidelines will help you to improve your projects, delivering websites with great usability.