The orange is your call, unless your laws specify something different. Missouri law specifically says that camo orange patterns do not meet Missouri's orange requirement, so camo orange is illegal here. I see people wearing it all the time though and every year someone is bitching cause they got fined $500. for not wearing orange when they were covered head to toe with camo orange, and it's not right cause they bought it at Wal -Mart, and Wal-Mart shouldn't sell it in Missouri if it isn't legal and on and on. Just make sure it's ok in your state and any state you may travel to. Most people overlook some of these things in the excitement to go hunting. Don't know how many people travel with friends for 14 hrs to hunt another state and don't take time to read the law on the way, or a few weeks early before their trip is ruined by something they're not prepared for.
As far as wearing tan, I knew a kid who got shot in the chest with a 30-30 wearing Carhart coveralls and no orange, just a year or two after the orange law came into effect. I have worn them for years also but never forget my solid orange vest and separate hat. And I haven't been shot, so it's working so far.
I have just begun to wear camo outer clothes and my vest and hat the past few years and think that works better for me. I like to stalk and the less they can see the better. The camo helps hide some of my arm and leg movement anyway and helps everything but the orange blend in better. I'd really like to find solid orange 3D camo vests to wear over my turkey hunting camo.