from this
to this
1. Take your picture, resize it and crop it.
2. Create a selective color layer:
reds: -90 0 +53 0
greens: +100 0 -100 0
whites: +66 -64 -100 0
neutrals: +22 -11 -23 0
3. New curves layer:
RGB
point 1: 108 149
point 2: 156 211
red
point 1: 80 88
point 2: 134 155
green
point 1: 121 131
point 2: 153 155
blue
point 1: 112 128
point 2: 152 165
4. New color balance layer:
midtones: +14 -6 -20
shadows: -13 +14 `36
highlights: -5 -7 -8
5. Correccion selectiva:
reds: -44 +7 +28 0
cyans: +72 +17 -14 0
6. Set
this texture to screen, to fill the black part of the icon.
.psd more examples
more tutorials
here