Change font colour/size on pages

Hi great theme it looks superb.

I am using pages on illdy theme and I would like to change the font size and colour as it is clashing with my colour scheme I have at the moment. Or even change the text so it has a white background to make it more visable.

Also there is a big space between the page text and the white header (with yellow period). Can you tell me how to decrease this?

I have attached a screen shot also.

Kind Regards

Can anyone help with this?