@lain i think part of it is because "warm light" is associated with many the thermal radiations on earth. things need to be hotter than the suns surface for to release blueish thermal radiation. and those things also release plenty of red and infrared light.
the blueish things we do typically encounter aren't that color because of thermal radiation, but because of partial reflection, rayleigh-scattering and (chemo-, electro-, photo-) luminescence.
(in case you were actually asking 😅.)