The link colour for a parent item (Link Color: Parent) cannot be defined and thus reverts to the default value when rolling over a sub-menu.
It would be great if that feature could be introduced.

see http://forum.bytesforall.com/showthread.php?t=4720

I'm talking about something different here.
In WP, there is a "Background color: Parent" property that adds adds a background to "li:hover a".
I was thinking that maybe the theme could introduce a "Link Color: Parent" feature.

Simply adding color: to "li:hover a" doesn't work because of the C in CSS.

In WP, there is a "Background color: Parent" property that adds adds a background to "li:hover a"

Really, where do you set it? I can't seem to find that WP option. Am I missing something on the Menu screen?

It's on the Menu x page, in the Background color section

do you mean dashboard->Appearances->Menu? I don't see anything to change any colors/ Do you have a plugin?