For everyone, 
to change the theme's color past Base2x.png in the file: C:\Documents and Settings\"username"\Local Settings\Application Data\Stardock\DesktopX\CurrentTheme (change "username" to the name of your account user in Windows)

Just Save the theme and Reload it (with DXclients(without dxbuilder versions) enable "save the current theme" in config ( right click on the program icon in system tray))

You can find in differents folders 9 colors:

Green
Purple
Red
Yellow
Black
Transparency
White
Blue ( original's theme color)
and Cyan

I hope you like it and Have fun