Red colour is actually used to represent danger, courage, and excitement. People and even animals get excited when they see this colour. That's why you see bulls charge when a cloth with the colour is held for them to see. It's the secret of some advertising agencies. People will feel excited when an item has the colour on it. Sales people used it to to draw people's attention and encourage them to make the move to buy.

Blue color, depending on the hue, has different significance. The sky blue represents calm, shows that someone is trustworthy and also is knowledgeable. It inspires trust and openness. People who put on those colours are perceived to be approachable.

The navy blue connotes a sense of responsibility, like someone or something can be held accountable. It also speaks of orderliness, like everything is under control. It speaks of inner peace and security.

Green speaks, signifies life, health. It signifies relaxation, calmness. It also represents fertility, especially lime green. It signifies growth and productivity.