[Plugin: Price Table] Change Button Color through pricetable.css

I’m trying to edit the code from pricetable.css, however I’m not that proficient with css coding.

I would appreciate any assistance given on how to change the stylesheet so that I do not get the gap in my buttons between the border of the button and the fill. You can see the example here http://absolutevision.biz/#price

Appreciate all help offered here. Thanking all in advance.

http://wordpress.org/plugins/pricetable/