Designers, Developers

1.4.11 Non-text Contrast

 

Make sure you have a minimum 3:1 color contrast ratio for user interface components and states and graphical objects that convey meaningful information.

Developers

4.1.2 Name, Role, Value

 

For all user interface components (e.g. forms, links, scripts, controls, etc.), the name and role of those components should be coded in. Any states, properties, and values set by the user should be able to be programmatically updated so browsers and assistive technologies recognize them and reflect those changes.

Developers

4.1.1 Parsing

 

Make sure your website uses correct markup and is free of errors that may create usability problems.