suggestion for couon code box

[buckeye]

We are using Joomla 2.5 with PayPal.  The coupon code presently used (and the same seems to be in your onepage checkout) is small and hard for the buyer to find.  Would it be possible to have the box larger and even in color?  It would be nice if the box could have a flashing border.  Anything that would make it stand out!