First off, Shewei great link, love it and how true.
Camoflauge is what ever you want it to be, if you want to blend in you need to adapt to your surroundings simple as that. You can wear what ever you want within reason. If you wear DPM in town you stand out like a beacon, wear grey plain colours and you just blend in, look at the film "The Hunted" this shows you various ways of dissapearing in various environments from woods, fields, towns etc.
Whilst in the MOD on a cam & concelement training course we experienced cam at its best we were taken to a small wood and told to spot the four guys hiding within 50' 2 we spotted after a few mins the other 2 had to move for us to spot them, one was stood upright in bush about 15 - 20' away, the other was led down not 4' from our feet and non of us had seen him at all.
I have been out watching wild life and had people and dogs walk straight past without seeing me, simply because I sat still and they were not looking for anyone.
Once when I was a young lad we were caught scrumping (nicking pears & apples) we ran off but the farmer followed, I slid down a ditch and into some brambles he stopped not a foot from me I just froze and held my breath thinking of the beating I would get from him & my dad if caught. He did not see me.
So the question of cam, DPM, etc it totally depends on from whom or what you want to be hidden and where you want to hide.
When out and about in the bush I tend to wear earthy colours, and if I want to disapear I use the surounding natural cam to blend in.