Make running applications stand out on the taskbar more than they do (on Windows 8)

Apologies if this has been requested before - or if Windows 8 actually includes this option somewhere - but I'd find it valuable. For it would help distinguish running programs from mere shortcuts. At present all one gets is slim black lines to the left and right of the relevant icon. Some sort of glow - or just a light yellow background - would be better, I think.

Thanks for your time!