Whether you are designing a websites or form or a menu interaction, be sure to annotate accessibility requirements into the documentation you provide for developers. For example when you are designing the way a form looks, specify meaningful form labels and add a notation to the developer that the form must be accessible.
Adding accessibility notations to your documentation is a great way to set the stage as early as possible for integrating accessibility requirements into software and web design projects.
Please plan some time to watch this YouTube webinar, Translating Design Wireframes into Accessible HTML/CSS, to help you get started.
Here is a handy checklist to help you create more accessible web and application designs.