Original Image
Background Colour
Background Colour set to an element, such as column, or inner.
A mix-blend-mode of Multiply was used.
Depending on the snippet block used, there will be different elements that you can target to apply the background colour to.
Columns generally have space around the outside, but if your snippet block has FIGURE, IMGBOX or INNER elements available, these can have their background colour set via the STYLE EDITOR (example below).