Harley Quinn is posed majestically atop a grey platform, wearing a fiery black and red dress with a black mask covering her eyes. She wields a huge hammer in her right hand, with the left one raised and clutching the handle of a tiny black gun. Her golden locks are held in two delicate pigtails, making this an unmistakable portrait of the DC Comics character. When choosing a color scheme for this illustration, try to emphasize Harley Quinn's signature red and black outfits. Use bold hues to bring out the hammer and gun in Harley's hands while pops of yellow and pink will really bring out the character's individuality. You can also let your creativity go wild by further highlighting her outfit with bright and engaging colors, making Harley Quinn's portrait even more vivid.