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Made In Photoshop Cs2
Involves Selective Colouring
4 quick and easy steps
1. Duplicate your base twice and set each to Screen (this depends on your base)
2. Add a new layer, fill with, #02102D, set to Exclusion
3. New Adjustment Layer, Selective Colour,
Reds = -100 0 0 0
Neutrals = +100 0 0 0
Blacks = 0 0 0 +100
4. New Adjustment layer, Hue/Saturation,
Master Saturation = +25
Other icons made using this tutorial -