Guideline 1.4 – Distinguishable Make it easier for users to see and hear content including separating foreground from background.

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• [x] 1.4.1 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. Note 1: This success criterion addresses color perception specifically. Other forms of perception are covered in Guideline 1.3 including programmatic access to color and other visual presentation coding.

• [x] 1.4.2 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. Note 1: Since any content that does not meet this success criterion can interfere with a user's ability to use the whole page, all content on the Web page (whether or not it is used to meet other success criteria) must meet this success criterion. See Conformance Requirement 5: Non-Interference.

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• [x] Matching status User can perceive the matching status by
  • image/pattern difference
  • border color
  • status announcement by screen reader

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• [x] Score meter User can perceive score points by
  • background color
  • status announcement by screen reader
  • pattern difference