Application
{
background-color: #333333; /* behind the map. Spark default is #FFFFFF; */
/* affects only non-Modules : HTMLPopup (SplashWidget and "About") */
color: black;
/* affects only title/subtitle (unless .BannerTitle is in this file) and non-Modules : HTMLPopup (SplashWidget and "About") */
font-size: 12;
}
However, in version 2.1 of the ArcGIS Viewer for Flex (once it is released) you will be able to set the main colors in the main configuration file.