2.Switch to
Quick Mask Mode and use Filter-> Pixelate-> Crystalize with
setting of 3.
3.Switch back to
Standard Mode and save the selection (Select-> Save Selection).
After pressing OK, fill the selection with white (Edit-> Fill) or
whatever other color your heart desires. Then choose Select-> Modify->
Expand. You can enter 4 or 5 (depending how big edge you want). Now,
switch to
Quick Mask Mode again and choose Filter-> Blur-> Gaussian Blur
with setting of 3.

4.Now, go back to
Standard Mode and choose Select-> Load Selection and make sure
your saved selection (should be called Alpha 1 or #4) is selected in
the Channel dropdown. Check Subtract from Selection and press
OK.
5.Time for some color! Choose, Image->
Adjust-> Hue/Saturation and click the Colorize check box. Set the
Hue to 14, Saturation to 31 and Lightness to -61 (or adjust to your
preference). Tah Dah!
