Change default font colour

Hello,

On my website http://www.ultimate-coaching.co.uk/wordpress you can see there is a black background, the front page currently has white text because that text was added in a plugin, however things like the page titles and the font on the other pages (such as http://www.ultimate-coaching.co.uk/wordpress/?page_id=6 ) are a grey font.

If anyone could help me with how to get this text to be white i would really appreciate it.

Cheers