Menu font colour

Hi

I have a query regarding the site I am working on.
URL: http://www.menukah.com

My query relates to the menu colour.
If I am on the “About” menu, the colour remains as I want it, white on grey. However, if I navigate to the “Contact Us” menu, the colour goes to purple on grey, and if I hover, the colour reverts the way it should be.

How do I correct this?

I don’ have any custom css plugins running.

Thanx!