I have a problem which is probably very simple, if so I'm sorry.

I have a page using a WP theme which allows the switching between different color Stylesheets at the theme control panel.

It basically changes the color of the bar at the top of the page. There are 5 options, none of them yellow.. How do I edit or create a stylesheet that allows a yellow bar.

The bar is orange at the moment, here is the link

Thanks guys!