5 points
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.
5 points
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.
11 points
