Customize Header & Footer | Catch Wedding Free WordPress Theme

My site is as follows:  http://www.enwebdesigns.com/Cano-Nanawa-Wedding/ How do I customize the header so it does not have so much white space between the header image and the primary menu? I tried changing the size of the header image using the following CSS I found on your site, but it did not work: #masthead { height: 250px; } Also, how can I change the footer color to #34563e using CSS? Thank you in advance!