How to change the color of selected item in the topbar when is dropdown?

Hi Guys,

First of all cool and very clean theme. I am planning on using this theme for an intranet I’m currently setting up. Everything is working fine until I showed the theme in a presentation and one of my colleagues noticed a submenu in the top menubar when selected was not conform the company colors.

I changed all colors as required in the customization area of the settings for this theme. Somehow when I add categories to the top menu bar and add pages to these categories the are colored blue when selected.

I checked the styles.css and blog.css without success. Does anybody have an idea where I might change this color?

Thank in advanced!