Font Colour Change

Hi SI

I recently bought your Elegant Template.
It is a great template and like it pretty much as it is.

I would like some help modifying one single item on the template.
I want to replace the Blue colour that runs through out the template.

#3778B1

To the Green that is used on the Wanderers Template

#46BD7D

I know that I need to be adding something similar to what is here:

http://stackideas.com/forums/change-the-font

But am not sure what exactly.

I have taken my custom.css file from the Wanderers Template and put it in the CSS folder.
So I have old hacks working again.

thanks

Paul