For Nora I was just playing around with the airbrush tool. At first I was attempting to make her one color that transitioned into another. I looked okay but I wasn't using the perfect colors. I decided to take a bunch of random colors and air brush them over her. I cleaned it up with the eraser then used the dodge tool a bit and this is the final result!
Edit: I took the bow tie and moved it up to the top of her head 
