It seems to me that there is a problem with the Codeless Builder and adding a new row to any page that includes a blog entry and has a custom background color:

I have added different rows to my homepage that include different elements and might have custom background colors. The problem is that if you add a blog to a row the background color of that row gets set to the following rows, too.

I have checked in the source editor of that page if the row tags are all in place and there is no poblem with that.

You can narrow it down like this: Background colors for each rows are all correct and are used with just the very row as long as that row does not include a blog. In that case the background color is used for every further row.