Try like this,
Hope this will solve ur problem
this is what i search, but the color you gave my, is a kind of green, and the border still not have this shadows..
maybe i should say, i'm using flex 3.5 with mx components (not spark) and the default theme "Halo"
default styles properties are coming from the default.css located in
search for the borderColor
There i find all what i need.