Colour

Denotation- A literal description of an object, concept or idea
Connotation- What is associated with an object, concept or idea

Denotation of red: a colour- a particular wavelength of the electromagnetic spectrum.

Connotations - Red
Stop
hot
danger
love
embarrassment
sex
passion
anger
blood

Denotation and connotation

blue
Electric, water, cold, sad, calm, lifeless, sky, blues music, police, ocean, blue flame, boys

green
Environment, money, spring, healthy food, nature, illness, go, envy, bogies, grass, toxic