I have been told that deer can see in colour, but only close up. Badgers have pretty poor eye sight at any distance so being quiet and scent control are more important than camo.
On the other hand, birds see very well in colour and by wearing full camo, during the day, birds will often miss you. By not alarming the birds, the whole wood is not alerted to your presence.
In most cases I feel that DPM is too dark a pattern, at night it shows up more than regular OG, and only really seems to come into its own in deep woodland. I like the American Realtree patterns, if you can get some with a lot of green in them. Most US hunting patters are too grey/brown for this country. Also beware of paterns that are incredibly detailed on a small scale, like Mossy Oak Break-up. At a distance it looks dark grey and stands out in except in dreary winter woods. The Brown Realtree tends to have a very tan background with I reckon matches a lot of soils and bark colours.
Some of the lighter plaid in greys, browns or greens work pretty well. Soft finish fabrics are better than those with a hard "abrasion resistant" finish, they are quieter, but also don't reflect sun.
I think the most important part of my camo is my gloves and face mask. In the woods the face and hands can almost glow like beacons.
They used to sell mesh over garments in camo. A jacket, trousers, gloves and face mask that would go on over other clothes. You could wear a white T-shirt and jeans, and no hint of white or blue would show through. The only problem was that they tended to snag on brush. Good for sitting still in though.