Circadian rythms are also influenced by colors
All "warm" colors have a greater or lesser red component, whereas "cold" colors have a blue component. For example, yellow can tend to orange thanks to a greater red component, and it will be more vibrant than lemon yellow and other hues where there is no red and a slight component of blue is present, even if not visible to the human eye.
After all, daily light changes pacing our days. In the morning, red frequencies are dominant and their effects are evident: most people feel more awake, active and enterprising. On the contrary, in the evening there are more blue frequencies, that set us out for calm, reflection, and a good sleep at the end of the day.
We should keep this in mind when choosing indoor lighting and furniture.
Relax-dedicated rooms should have colder hues: any shade that reminds of water, and even a delicate purple where blue prevails on pink.
In rooms dedicated to eating, working or playing, there should be warmer hues, because they are stimulating: especially shades reminding of earth and stone, such as sand, sienna and desert sand.