Sagittarius' astrological color is purple.
Purple is the royal color, associated with nobility and worn by kings and queens throughout history. A mysterious color, purple is also strongly associated with spirituality.
Because purple is derived from the mixing of a strong warm and strong cool color (the opposites of hot red and cool blue combine to create purple), it has both warm and cool properties - much like the Sagittarian.
A purple room can boost a child's imagination or an artist's creativity. Too much purple in the environment, especially when it's more blue than red, can aggravate moodiness in the Sagittarian.
The color of mourning for widows in Thailand, purple was the favorite color of Egypt's Cleopatra. The Purple Heart is a U.S. Military decoration given to soldiers wounded in battle.
In the natural world, purple has a special, almost sacred place. Purple flowers, such as the lavender, orchid, lilac, and violet flowers, are often delicate and considered precious.