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Hey Everyone! I'm trying to make th background of just one of a few hundred posts on my blog black (#000000.).Here is the extra CSS I added at the bottom. How come it doesn't work (even after cearing cache?) Is it the word "wrapper?" I don't have any borders around the post.
.postid-17829blog-post-wrapper {
background-color: #000000 !important;
}
.postid-17829 .entry-title { color: #FFFFFF;}

We need to see the page itself to be able to determine the problem.
I doubt the selectors used in your first rule exist like that.
In your CSS, `.postid-17829blog-post-wrapper` is being treated as a single class. If `postid-17829` is the class for the post and `blog-post-wrapper` is the class for the wrapper, you should add a space between them.
`.postid-17829 .blog-post-wrapper {`
`background-color: #000000 !important;`
`}`
`.postid-17829 .entry-title {`
`color: #FFFFFF;`
`}`