[SOLVED] Background colour and width of menu bar

Hi everyone. I'm working on www.ragbaby.co.uk but I can't seem to shift the pale colour background at the end of the menu. I want it all to be black with a pink underline.
I'm probably doing something really stupid. I've goine through the options on menu 1 but nothing seems to shift that block of grey.

Also, it's a few pixels short so it doesn't line up with the end of the right hand column, which is why I want it to be black. If I could fix it's width I could have it different colours.

Any help appreciated.