I think its a pretty good match :D
First I painted the skin color on the areas where the shirt lays closest to the skin.
Next I took the purple color of the shirt and applied it to all of the wrinkles (the raised parts). This parts are supposed to be the most removed from the skin, so they should be the solid color.
Blending in the colors.
Added purple pastel shading. As you can see, its very bright and stands out too much.
I added another thin layer of purple shirt color to blend the pastel shading with the rest of the shirt color.