this post was submitted on 04 Aug 2023
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Wild guesses...
Easier to clean.
Or maybe the material it's made of, isnt white.
Or maybe because it has such little thermal mass, that it doesn't matter.
Or because they liked the colours for aesthetic reasons haha.
Also choosing a cloth colour has nothing to do with thermal mass and everything to do with absorbtivity/emissivity/reflectivity aka material properties affecting radiative heat transfer.
In any case, shirt colour has a small effect on temperature, maybe a 5°C (at most) difference between white and black, according to some studies. So unless you're really chasing the most optimal clothing, it's best to just wear what makes you happy.
5°C is huge!