I have to agree with the previous posters. When hunting black bear, scent control is essential. It's been said that a bear's nose is 100X more sensitive than that of a domestic dog's.
While bears are far from blind, their eyesight ranks a distant 3rd behind their senses of smell & hearing. While camouflage surely can't hurt, many bears have been killed at close range by stand hunters who were mandated to wear blaze orange by local hunting regulations. Bears are much more likely to key in on movement than the color of your clothing. That being said, unless the law requires you to wear hunter orange garments, any camo pattern or subdued color clothing should serve you well while bear hunting. If you MUST wear blaze orange, avoid wearing it on your extremities (hands, arms & legs) as this will only serve to exagerate any movements that you do make.