You will find the colors only in postcard_create.html. Maybe you have set a global background color for all <td> tags in your style.css like:
ul, li, p, td {
color: #004c75;
font-family: Tahoma, Verdana, Arial, Helvetica, sans-serif;
font-size: 11px;
background-color: #e8e8e8;
}
Jan