http://www.sciencemag.org/news/2019/10/what-makes-people-happy-when-skies-are-gray-color-yellow

Yellow is usually the color of happy, joyful emotions. But according to a new study, not all people associate the sunshiney shade with good vibes.

To find out what factors might play a role, researchers tested a new hypothesis: What if people’s physical surroundings affect their feelings about certain colors? For instance, if someone lived in cold and rainy Finland, would they feel differently about the color yellow from someone who lived near the Sahara Desert?