Edit theme custom page css

Hi,
i am a total nuts with css. I am using Deep blue theme and i want to make some changes to the link and heading colors in a custom page that i have created. I want links to be blue and headers to be dark orange or yellow.
Tried finding the css file bt dnt knw which part to edit.

It seems the css for custom pages is different from that of the main blog. Pls help me. . .
You may view my site and the download page that i want to edit. http://www.anetz.in

still working to setup a proper site. Comments, suggestions and criticism are welcomed.