Communication, trust, loyalty, and depth. Blue is the color of number 6 — responsible, caring, and deeply trustworthy. It is the color of the sky and the sea, of infinite perspective.

Wear blue for important meetings, difficult conversations, or any situation where you need to project credibility and trustworthiness. It is the most trusted color globally.

Deep blues can suppress appetite — avoid in restaurants or dinner party settings. Avoid cold blues when warmth and intimacy are needed.

Blue bedrooms create the most restful sleep environment. Blue offices promote concentration and calm. Avoid blue in dining rooms.