Hi there,
you need to go into your editor and then change it in your stylesheet. Then search for your header and put in background: color; Replace color with the color you want.
Copy and paste your stylesheet and save it as a backup before you make any changes in your editor okay.
Please read about creating a child theme as you will lose all updates you make to your theme if you do not create a child theme and make these changes in your child theme then.
Kind regards
@gerritn –
you need to go into your editor and then change it in your stylesheet.
Definitely NOT the way to make changes. Please do not even say that – if you want to help, explain how to make changes in a child theme – and include links to the child theme page – http://codex.wordpress.org/Child_Themes
@trout140 – if you are only going to make CSS changes you can simply use a CSS plugin like Custom CSS Manager – and then put the code changes there. But we’d need to see a link to your site to help with the specific code to add.