I've haven't been able to figure this out for weeks. So went down through the .js files an here you go:

In application.css write this.

Code:
#OWEBAPP .WebList_Selected {
   background-color: #CCFFCC;
   color: #003300;
}
the above applies a slightly greenish color to the current row of all cWebLists and cWebGrids.

Kind regards

Jan Ole