I just got some inspiration to start a new AeroHybrid theme, from going through @Arc's carbon wallpapers.
I just got an interesting gradient effect:
Cool side effect,
my personalized custom start menu tiles, background color(BackgroundColor='#343434') now have the exact same color as the system accent color, giving them even more an icon effect(being larger and filling out the tile more).
NoteAchieved by choosing the accent color and turning off transparency for taskbar, Start Menu & co.)