NOUBI SAYS: It is important to understand that color has properties. Colors have a demonstrable psychological effect. So, our automatic reaction to colors is so strong. Colour Guidelines According to Seasons: ✓  Summer – Think clear, contrasting, and bold colors. ✓  Fall – Think soft, cool, slightly-grayed colors. ✓  Spring – Think bright, fresh, and lively colors. ✓  Winter – Think deep, dark, and muted color