As we have been reporting, there are a number of changes happening to Blackboard over the summer.
One of these changes is a new, responsive theme. Responsive themes are optimised to work on different devices, scaling-down to accommodate smaller screen sizes. Access to Blackboard via portable devices, such as smartphones, is growing rapidly, and the new theme helps support this growth, whilst providing an improved experience for all users.
To accommodate the responsive design, Blackboard no longer supports individual “Course Themes” (some examples below). Any courses that have a Course Theme applied will find that it has been reverted to the system-default design following the responsive theme application. This only applies to course design, course content is not affected.
You will still be able to personalise your course using a banner on the entry page and colour on the menu. However, consider accessibility issues, and make sure there is sufficient contrast between the text and background colours.