Styling Custom Wordpress Menu and Buddypress Navigation

Hello. I'm wanting to change the background color for each individual tab in the navigation areas. I've removed the category navigation and just have the custom wordpress navigation and the buddypress navigation.

i'm wondering how exactly i go about styling each of those tabs. I've been able to locate the specific li id's for each one, but i'm having a hard time figuring out where i need to go to style them.

Here is a link to the site that I'm experimenting on:

And here is my active site that I'm trying to emulate:

Thanks in advance!