Is there a way to remove the light blue color that appears in the WP Admin bar?

I'm using the Ultimate Branding plugin and have been changing the colors of the Admin. I have it almost nailed down but am having one issue. In the Admin bar across the top, I changed the background to a light gray and the icons and text to a darker gray. When you hover over the icons and text, they turn black, but before they do, a light blue color flashes first, then turns black. When you hover over the Comments icon, the count displays light blue, and when you hover over the +New button, the work New displays in light blue (those never turn black).

I've been using Firebug but haven't been able to get the code to change the blue that flashes briefly to black.

Any help would be appreciated.

Thanks,
Trevor