Yes you can make the background color transparant.
To make the main body color and the header/footer color transparant simply slide the transparancy slider from right to left on the color selector


See example below:
Before using the transparancy slider

After using the transparancy slider

To make the main body color and the header/footer color transparant simply slide the transparancy slider from right to left on the color selector


See example below:
Before using the transparancy slider

After using the transparancy slider

Published on: 22 / 10 / 2019