It really depends on what you're gearing for. Personally, I lean towards the "gray man" look for a bugout scenario, thinking along the lines of a natural disaster. My current bag isn't like this one, but if I was in the market to buy a new one, I'd go with something like a camping backpack in this video. I'd get something similar to a police duty rig belt for EDC tools. Modern military boots. Some black or brown paramedics pants. A black, gray, or dark green hoodie to throw on over my plate carrier. Black boonie cap. And this backpack in black for all of your camping supplies. You would easily blend into a crowd of evacuees marching along side a highway, but you'd still be in a color scheme that would allow you to vanish innawoods too. That's a "gray man" look you'd want to go for.
https://www.youtube.com/watch?v=325qNUVWabc