Please see below guidelines for accessibility.
DDA and W3C Compliance
Provide a text equivalent for every non-text element (e.g. via "alt", "longdesc", or in element content). This includes: images, graphical representations of text (including symbols), image map regions, animations (e.g. animated GIFs), applets and programmatic objects, ascii art, frames, scripts, images used as list bullets, spacers, graphical buttons, sounds (played with or without user interaction), stand-alone audio files, audio tracks of video, and video
Ensure that all information conveyed with colour is also available without colour, for example from context or markup.
Ensure that foreground and background colour combinations provide sufficient contrast when viewed by someone having colour deficits or when viewed on a black and white screen.
Use style sheets to control layout and presentation.
Divide large blocks of information into more manageable groups where natural and appropriate.
Clearly identify the target of each link.
Use navigation mechanisms in a consistent manner.
Create a logical tab order through links, form controls, and object.
Validate HTML and CSS where possible.
Should validate the accessibility checklist (WCAG Checklist, Click here ).