Hi all,
I came upon a solution by trial and error.
The following allows you to apply a background to all Image Card blocks, including the stacked configuration. You'll have to look up the hex code for the color you want to use of course.
I then found that the text inside said cards was too close to the edges - something that isn't as noticeable when there is no background; it's especially apparent on mobile. I therefore added a bit of padding, which you can see in the code below (excuse my syntax).
Hope others are helped by this!
.design-layout-card {
background: #FFFFFF;
}
.design-layout-card .image-card>div {
padding-left: 5%;
padding-right: 5%;
padding-top: 5%;
padding-bottom:5%;
}
}
