If you have a card or section you’d like to dynamically colour based on the post category you can do this in Breakdance by using Attributes and a little CSS.
First add a custom class to the element you want to colour ( I find it’s easier to do this on the top element if you have a card ).
Then in Attributes add data-cat and in value select Dynamic Data and the taxonomy of category.
Then in the Custom CSS add the following.
.customClass[data-cat~="categoryNameHere"]{
background-color:#fff; /* Styling here */
}