Curt,
the button-highlights are very limited for DVD depending on the DVD-specs. it´s a 2bit RLE-grafics that containg all information.
so you have only 4 different colors that you can use for 1! menu at a time, or at least 1 color and 4 different saturations/opacities.
if you have ever seen a menu that containing more that that – that´s not possible. in most cases authoring-programms using a workarround like layered menus to give you the illusion it would work, but it wont.
layered menus have some other disadvantages, they couldn´t have audio and they are very, very slow in reaction.
so the conclusion is:
you can only use 4 colors at a time in your menus, or 1 color with 4 different opacities.
NOTE: button-highlights have NO anti-aliasing
cheers
danny