Well, I'm intending to get around to doing an Underworld Creepers team at some point (some of you may remember the Creepers Skaven Thrower I entered into the TBB painting comp). One point with that Creepers/Bungles scheme is that 'tiger' stripes are both tricky and time consuming.
Black/Orange (Browns). Aaaargh! Please no...painted up a sizeable (27 fig) Shadowforge team in those colours recently, and I really don't wanna go there again yet. Got a bit gutty towards the end and in truth I haven't picked up a brush since.
Please don't make me go there again.
In fact NFL style uniforms are difficult to get right in general on 3e/WFB figs...
I'm voting with the purple/black...relatively simple, looks effective and sets off the green flesh nicely.