I'd go with a light to mid grey color as my primary base color in any of that stuff you can paint. Even if it comes in black I'd give it a quick once over with grey and then splotch it with some greens, yellows etc. to break up the straight lines. If you can make it harder for humans to see deer won't see it. And like you say, black stands out up in a tree. I have a couple hang ons that utilize black straps to hold them in place. that black strap really stands out. That said, boy does a black bear disappear in the underbrush. Big ole turkeys can vanish pretty quick too.[&:][&:]