Hi, I just solved something similar with main page. And solution was to add this to custom css:
.home #main
{
background-image: url(".../wp-content/uploads/2014/04/image.jpg");
background-position: center bottom;
background-repeat: no-repeat;
}
So you should maybe try to find something like “.single #main” or “.blog #main”. I use image, so your code should be more simple.
.single #main
{
background-color: #your color code;
}
But maybe there will be some better solution.