to

01. choose a picture, crop it, sharpen edges etc.
02. Layer > Duplicate Layer and set it to screen 100%
03. Layer > New Adjustment Layer > Levels
        Input levels > 68 / 0,86 / 255
04. Layer > New Adjustment Layer > Selective Color
        REDS: -34% / 15% / 10% / -15%
        YELLOWS: 41% / 23% / 12% / 18%
        WHITES: -40% / 0% / 27% / -62%
        NEUTRALS: 30% / 0% / -5% / 26%
05. Layer > New Adjustment Layer > Curves
        RGB I: 95 / O: 85
        RED first spot I: 167 / O: 143  second spot I: 52 / O: 64
        GREEN first spot I: 164 / O: 172  second spot: I: 76 / O: 97
        BLUE I: 160 / O: 158

PSD

Icons made with this coloring:
 


 to

01. choose a picture, crop it, sharpen edges etc.
02. Layer > Duplicate Layer and set it to screen 100%
03. Layer > New Adjustment Layer > Levels
        Input levels:  49 / 0,55 / 255
04. Layer > New Adjustment Layer > Curves
        RGB I: 131 / O: 124
        RED I: 50 / O: 60
        GREEN  I: 160 / O: 158
        BLUE  I: 108 / O: 95
05. Layer > New Adjustment Layer > Color Balance
        SHADOWS:  -35 / -11 / -23
        MIDTONES:  1 / -9 / 10
        HIGHLIGHTS:  -1 / -1 / 11
06. Layer > New Adjustment Layer > Selective Color
        REDS: -40% / 15% / 15% / -20%
        YELLOWS: 12% / -15% / - 12% / 25%
        WHITES: 0% / -10% / -10% / -29%
        NEUTRALS: 10% / 0% / 5% / 5%

PSD

Icons made with this coloring:


If you have any questions, feel free to ask them. :)