In order to better understand colour relativity we have been assigned to choose our least favourite colour (in my case a light brown) and try to make it work alongside other colours for a children cover book.
I think light brown is my least favourite colour because it has bad connotations as it is easily associated with dirtiness. Although, it is one of the most predominant colours in nature and maybe that is why is not special to me. The earth and many variations of hair, animal and human skin are in this colour. All the chosen colours are uncoated as it helps to make them merge.
This redviolet shifts the brown to something less banal and, at the same time, the brown softs the overpower the redviolet has, resulting in a pleasant combination.
As brown is predominant in nature so it is blue: the water and the shore, the sky and the mountains or a satellite picture of the earth are some examples where these two colours go together. That might be the reason why is comfortable for the human eye to see them next to each other. Blue animals are usually considered beautiful because there are not many and they look impressive in their brownish environment.
As well as blue, green is also very commonly present in nature and it gets along with brown in the same way, so the association might be the same one. Camouflage gear usually have these colours as well, based on the predominant tones of the nature, but this military design has connected fashion and nature in a unique way, transforming the original assumption of a cloth wore by soldiers for something urban.
Depending on the level of luminance and saturation a colour has it may has very different connotations. Where in the image on the left we see a happy farm, in the right we can appreciate darker feels that might imply something not very nice is happening in the story.