Change fontsize, textcolour and background

On the page where we can write a review I need to change some things. The link to write a review needs to be more into
the picture. So I need to change it to a bigger fontsize, red textcolour instead of black and a coloured background. Can anyone point me into the right direction.

Look at the picture on the link below and you know what I'am meaning.

http://www.bannerwinkel.nl/voorbeelden/ToroSushi.jpg

With regards, Wim