Setup A course with a couple students enrolled. An assignment activity with due date in the past. A lesson activity with a simple multi choice question A quiz activity with a simple question. Notification Log in as s1 . Click on the bell icon and then in the cog to go "Notification settings" Enable both Online and Offline for Assignment notifications . Go to the assignment and make a submission . Note there's a new notification, click on the bell icon. Hover onto the new notification. Make sure when you hover onto the notification the colour is inverted to blue . Make sure texts and links has enough colour contrast compared to the background color: Messaging Log in as a admin and send a private message to s1 . As s1 go to Messages and expand Private tab Make sure when you hover onto the notification the colour is inverted to blue . Make sure texts and links has enough colour contrast compared to the background color: Lesson As s1 , go to the lesson and submit an answer. As admin go to the lesson , then click Reports tab. Go to the Detailed statistics tab and note the correct answer. Make sure the the correct answer now is green and it has a "Correct response" badge: Assignment As admin , go to the assigment acitivity and click View all submissions button. Make sure the "Assignment is overdue by: 1 day 12 hours" message red colour has enough colour contrast. Now click on Grade button for any user. Note the Not graded and Overdue labels Make sure the red has enough color contrast against the background grey colour: Quiz As s1 go to the quiz and make an attempt . After the attempt, look your Summary of previous attempts Inspect the the attempt row and in Styles, Force element state to :hover Make sure the blue has enough color contrast against the hover background grey colour: