Yellow inspires original thought and inquisitiveness. This color relates to acquired knowledge. It is the color which resonates with the left or logic side of the brain stimulating our mental faculties and creating mental agility and perception. Yellow is the best color to create enthusiasm for life and can awaken greater confidence and optimism. The color yellow loves a challenge, particularly a mental challenge. Yellow is the most highly visible of all colors which is why it is used for pedestrian crossings.