I'm worried about my wife overheating our newborn.

As a new mother, it's natural for her to be very worried about everything. I'm a new dad too, so I don't know a lot.

Where we are currently living is a tropical, humid country, and oh does it get hot. But wife is very concerned about baby being too cold - if her hands feel a little cooler than the rest of her body, it's because she's freezing. Currently, my wife is sitting in our stuffy room without fan, AC, door or window open, and baby is in a legless onesie then full bodysuit, with mitts and a hat. I'm worried. She just took her first bath and got a little cold, her face briefly turned purplish which I read can be normal... Anyways, I could completely be under reacting and my wife totally right, but they say you can judge what's comfortable for a baby by your own temp to a degree, and I barely be in our room with how hot and lightheaded I get.

Does anyone have some very reliable sources or experience to read into about babies and hot and cold?