/cgl/ - Cosplay & EGL

This isn't cosplay so much as it is LARPing, but the threads here seem fantasy-based, so:

I'm working on a costume for a post-apocalyptic larp. Because I'm close to a poorfag, I'm re-using a lot of my old stuff, which leads to the question:

Given a green jacket, brown pants and black boots, what color shirt should I wear to look decent, and not be murderized in the heat? (Jacket is linen so less of a concern, and I need it to bolt my armor plates to.) White, the classic fashion choice, is out since you know, apocalypse. I was thinking black, but that seems like it'd be murder in the heat. (The LARP runs in the summer season for most events). I'm also accentuating with goldish/brass-ish plates for armor, if that makes a difference.