Photo: Allexxandar/Shutterstock.com Though this might sound hard to believe, color psychology is a real thing, and even in astrology zodiac signs have colors that bring out the best in them. According to Science of People, colors affect your behavior, mood, and impression on others. Power colors have the ability to signal action and even affect physiological reactions. So when a Gemini wears the right color it can boost confidence which is great for an interview, first date, or going out with friends. What color is Gemini? Geminis — those born between May 21 and June 20 — are outgoing and intelligent people, and when they wear the color yellow, this really shines through. This is because yellow is one of Gemini's ideal power colors. RELATED: Your Zodiac Sign's Power Color, According To Astrology As an Air sign ruled by Mercury, Gemini are incredibly communicative, witty, and sociable. They are free spirits who welcome new changes and adventures ...