Found it! If anyone else is looking you edit the catalog/stylesheet.css
.cssButton {
background: #C1DBED;
color: #000080;
width: 100px;
height: 20px;
vertical-align: top;
font-weight: normal;
font-family: Tahoma, Verdana, Arial, sans-serif;
font-size: 12px;
cursor: pointer;
text-align: center;
text-decoration: none;
border: 1px;
border-style: solid;
border-color: #000080;
border-spacing: 1px;
}