Traditionally, opera masks are representative of the characters they are connected to. The character traits are symbolised through the conscious use of colour. Red on a mask is an indicator of positive character traits such as prosperity, loyalty, courage and heroism. Purple often signifies justice and sophistication and can sometimes be a substitute for red. Black is used to show neutrality and integrity. Blue stands for a stubborn, astute and fierce character, while green is a marker for violence and impulsiveness. Yellow depicts a hypocritical, ambitious or sly personality and white, indicates evil.