The style information of all controls is defined in the file <your-webapplication>/cis/styles/CIS_DEFAULT.css. The style information is sorted alphabetically. Omit the prefix "ROW" or "COL" for container controls - e.g. you find the style information of the "ROWAREA" in "AREA".

.AREATable
{
    font-size: 10pt;
    border-width: 0;
    background-color: #E0D8C8;
    border: 1 solid #808080
}
.AREATitleCell
{
    font-size: 8pt;
    color: #808080;
    background-color: #00006C
}
.AREALeftFromTitleCell
{
    font-size: 8pt;
    color: #808080;
    background-color: #00006C
}
.AREARightFromTitleCell
{
    font-size: 8pt;
    color: #808080;
    background-color: #00006C
}
.AREALinks
{
    color: #FFFFFF;
    text-decoration: none
}

Take further information out of the comments describing when which style class used.