Subscribe2 – Customize Optin Area Box

How do i change the button font and change the font colours, maybe even add a bacground image to the subscribe 2 opt in box?

I have the optin box added on the right side of my website with the standard settings (which looks so dull and boring)

http://lotus-star.com/

Cheers guys