How do I change colour of listBox highlight?

Hey there, I’ve been doing a little customizing of the listBox component but I can’t figure out how to change the highlight colour. At the moment it is the standard green halo glow and I would like it to look more like the attached picture.

I guess I need to find the movie clip that is the highlight and edit it but I can’t find it in any of the external libraries of components.

Anyone got any ideas how to do this?

I would also like to get rid of the highlight that appears when you roll over the listBox.

Thankyou!
Schm