Header Alignment

Hi Guys,
I'm wondering if anyone was successful in the alignment of headers in last week's assignment? Remember, we had to set the h1 headers in the head section to be a certain color and align center, which was fine, but then in the body we had to change the color and alignment of one of them. The color was no problem, but the only way I could find to get it to align right was to put a div within the h1, and when I did that it wouldn't validate strict anymore. I know a lot of you in class seem to be fairly well experienced in this stuff already, so I'm betting someone can clue me in!