Camo is only useful if you have the movement, stealth and concealment skills, first and foremost. The camo just tricks the eye. The less movement you make, the less you will be spotted. Stay out of eye level view, and stay in the blind spots of the eye.
Black camo works, as long as you stay out of typical lines of 'sight' and remain stationary as much as possible. The brain is programmed to recognise human form. Black promotes human form. Nothing black that moves, is natural apart from a few hunting cats (panthers, pumas) which use speed rather than stealth.
Remember your colours. You have primary, secondary and tertiary. Khaki or Olive Green would be much better, as those colours are secondary, possibly tertiary, meaning that the blend of colours to make it, make it more natural to the eye. The reason why DPM and those types of camo work is because it uses secondary and tertiary blends. It takes the brain and eye much longer to recognise blends of colour than the one colour. Tell me how many colours multicam is, and you will not be able to in time before being shot.
Anything solid and primary colour, or pure black/pure white will just make you look like a pop tart on a thermal scope, unless you are extremely good at mimicking shadows and light, rather than human form.