Email Lite background color transparency

Hi,

When you drag a new Block into an email in Email Lite, its background is standard fully transparent. If you change the background color of the Page Content, then that color shines through in the blocks.

You can change the background color of a block to another color,

but I cannot find how to set it back to transparent again.

Does anyone know how you can make the background colors transparent again?

Thanks,

Joyca