Any camo that breaks up your silhouette is good enough. Even UCP is good for that. As for the best, none is any better than the others if you are moving or presenting a silhouette. Camouflage is intended to help break up your silhouette while you are stationary. You want as much shadow as possible as well.
Where the largest mistake is, that most people dress to the nines but forget there hands and face. Which for most people shines like a beacon. Again, while moving, it doesn't matter, but when stationary, try covering your face with netting, dark tan (coyote) or darker.
A dark camouflage is better in the shade and prone, not moving. Dark includes camouflages that are black, green, or brown based. This includes (but are not limited to) woodland, MC, flektarn, DPM, ATACS FG, most Russian patterns, solid black, solid brown, and OD.
Some tans, including desert marpat, chocolate chip, and solid coyote are dark enough for this purpose in really arid conditions.
Really light patterns/colors such as 3 color US, khaki, and urban blues have a hard time functioning as intended.
ATACS AU, Desert DPM, and UCP are marginal in thier effectiveness.
At the end of the day it doesn't matter what color you are wearing. Tigers and leopards are friggin orange ffs. The stripes and spots are what breaks up thier outline. You won't see them until they pounce.
