WHICH COLOR FEATHER EXTENSIONS?

Wondering which colors I should get. I have dark brown hair, dark brown eyes, fairly tan/olive skin. I can't decide whether to go with the natural colors, or go for something colorful. If I do get colors, I want to stay with jewel tones like purple or turquoise. I'm getting 3 in a bunch. Would one purple one go with 2 natural ones? Or what other colors should I get with purple. I'm open to any suggestions! :)