Psychology
Signals
Of all the colors, yellow gives the strongest signal. Red must be brightened to approach the light reflection of pure yellow. Blue must be brightened even more to reach the pure yellow brightness.
Blue
According to color psychology, blue is associated with trustworthiness and reliability. Dark shades of blue in particular are linked with authority and intelligence; midnight blue’s deep appearance is particularly likely to make this impression.
Midnight blue projects sophistication and elegance. Its linked with formal occasions and royalty means it conveys confidence, power and authority, while its deep hue can also come across as dark and mysterious.