DONT ADD ANYTHING HERE!

Perceivable

Information and user interface components must be presentable to users in ways they can perceive
  1. text-alternatives
    Provide text alternatives for any non-text content so that it can be changed into other forms people need, such as large print, braille, speech, symbols or simpler language
  2. time-based Media
    Provide alternatives for time-based media
  3. adaptable
    Create content that can be presented in different ways (for example simpler layout) without losing information or structure
  4. distinguishable
    Make it easier for users to see and hear content including separating foreground from background
    1. use of color
      Color is not used as the only visual means of conveying information, indicating an action, prompting a response, or distinguishing a visual element
    2. audio control
      If any audio on a Web page plays automatically for more than 3 seconds, either a mechanism is available to pause or stop the audio, or a mechanism is available to control audio volume independently from the overall system volume level
    3. Contrast (minimum) (Level AA)
      1. The visual presentation of text and images of text has a contrast ratio of at least 4.5:1
      2. Exception: Large-scale text and images of large-scale text have a contrast ratio of at least 3:1
    4. resize text
      Except for captions and images of text, text can be resized without assistive technology up to 200 percent without loss of content or functionality
    5. contrast (enhanced) (Level AAA)
      1. The visual presentation of text and images of text has a contrast ratio of at least 7:1
      2. Exception: Large-scale text and images of large-scale text have a contrast ratio of at least 4.5:1
    6. images of text
      Images of text are only used for pure decoration or where a particular presentation of text is essential to the information being conveyed

Operable

User interface components and navigation must be operable
  1. keyboard accessibility
    Make all functionality available from a keyboard
  2. enough time
    Provide users enough time to read and use content
  3. seizures and physical reactions
    Do not design content in a way that is known to cause seizures or physical reactions
  4. navigable
    Provide ways to help users navigate, find content, and determine where they are

Understandable

Information and the operation of the user interface must be understandable
  1. readable
    1. Make content readable and understandable
    2. The default human language of each Web page can be programmatically determined
  2. predictable
    Make Web pages appear and operate in predictable ways
  3. input assistance
    Help users avoid and correct mistakes

Robust

Content must be robust enough that it can be interpreted by a wide variety of user agents, including assistive technologies
  1. Compatible
    Maximize compatibility with current and future user agents, including assistive technologies

References

Web Content Accessibility Guidelines (WCAG) 2.1