There's a carpenter foreman from my client that almost always wears navy blue shirts. He's sweating and miserable, but still wears dark shirts. I haven't quite figured it out. I want to have a talk with him, but I feel it's like explaining water's wet. I just look and shake my head.
My Petzl's orange. I've work white helmets forever, and I don't even like white aside from it being cool. I figure it's a reasonable compromise. Not too hot, and I stand out from the other white hats on site. Based solely on looks and comfort, I'd like one in flat desert sand. It would work for climbing, but would be needlessly unsafe on the ground.