Hi Anna,

A quick and easy way to change the background colours (as well as other styling) is to add additional CSS in the Project settings. Go to Project settings, scroll down to Custom CSS/LESS code, and then add any additional styling for that project, such as:

.flipper-inner .flipper-item .flipper-item-body {
    background-color: #2f80ba;
}

To establish which elements (e.g. ".flipper-inner" etc.) you need to include in the code, go to your browser's inspection tool (for Firefox: menu button --> Web Developer --> Inspector). You should then be able to explore the areas of your project/page and see which elements are where. You can also alter the CSS in real time in this Inspector mode, to easily and instantly see what your changes would look like).

Hope this helps...