uhg I like how you colored it , I like the shadows from the hair strands but the hair looks as black as the mountains in the background
I turned up the brightness on my computer's monitor up to maximum (100) to be able to see the strands and the contrast too
: but my eyes got blinged by the strong colors on this page when I did that
I suggest you raise the brightness a bit and then the contrast too so the hair won't loose the contrast between the lighter strands and the dark part.
overall the image is quite nice :P