Beijing Opera tells stories of luck. The masks show the audience how the characters are trying to attract luck. The ‘Sheng’ is the male character. The ‘Dan’ is the female character. You can wear either. After all, good fortune is totally gender non-specific.
Next time you change your clothes, change your luck too.
The symbol of fulfillment, white helps your wishes to come true. A bright, pure background to wear when trying to lure good fortune. Especially if luck is your wish.