Now we have to select for each of the colors about two nuances: darker and lighter than the main color. Then insert schematically the lights and the shadows. For your convenience, when processing the colors, we may create a new layer above the layer with the main colors and group these layers: Layer ? Create Clipping Mask (ctrl+g) as for the new smudges not to get out from the inserted colors already:





We have to draw now on the layer with the background several big stripes, just to place the girl on the front plan:



Then we have to give to this outlined picture a finished appearance by copying the layer with the contours: Layer ? Duplicate Layer (ctrl+j) and blurring out the copy. Select for this operation the next options: Filter ? Blur ? Gaussian Blur.