Well, the drawings is nice, but there's still some room for improvement. The coloring is a bit hap-hazardous and low on contrast, but it actually creates kind of a cool effect. Just remember to go easy with the Photoshop filters and stuff... Also, the purple lineart goes well with the hair of that one girl, or the red dress of that other girl, or with their skin tones. But it sticks out like a sore thumb against the neutral and dark colors. I suggest you change the line in those areas, even if it is for a darker shade of purple.