Studies show that the humans can associate the colors with some emotions, feelings, characteristics as well. Yellow represents cheerfulness, energy, communication. The color white is related to succeed, faith, purity, coolness, simplicity. While reading a story and these colors keep coming up to your mind linking to the character, it can mean that the person is always happy, he can be peppy, always with willingness, he can be that kind of person who is lucky and everything comes great for him.