A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.
Fires are red/yellow. I’d imagine that’s a potential reason yellow light is “warm”
Also a bleak winter day is usually mostly whites and blues.
Also in low light, our eyes are more sensitive to blue light, so moonlight (though not necessarily the moon itself) appears bluer than sunlight. Especially in contrast to nearby fire and coals.
Heres a good minutephysics video on this topic: https://youtu.be/mqZm6u12RJA
TL;DW: Most lights used to be hot glowy things, e.g. fire, light bulbs or the sun. Those start glowing red hot at relatively low temperatures and become white hot at high temperatures. That's where the inverse scale comes from.
Uh, didnt know minutephysics had a video on this, thanks for sharing!
Look at someone who is cold, their lips are blue, someone who is hot, will be red.