Red is considered the oldest colour in the world. Its old age contributes to different meanings in different cultures.
Yellow is the third primary colour and the most versatile colour of all. Whilst red is hot and blue is cold, yellow is about everything in between. And as for any other colour, yellow has many conflicting associations.
Blue is a relatively new colour to the colour chart. Many languages in the world don’t have a word for blue, because in many cultures and languages blue is seen as a variant of green. Nature is sparse in it’s terrestrial reproduction of visible blues. In art blue paint was only introduced during the renaissance.
In English, orange is the only colour that comes from a fruit. Prior to the XVI century orange was commonly known as yellow-red and then this was replaced by the name of a fruit undeniably orange in colour.