My first tutorial ever, so it might suck.
Going from this:
to this:
It's done in PSP X2, but I'm sure it's translatable.
It's very simple. ^^
Sharpen your base (if it's too bright, set it to multiply)
-->
Layers > New Adjustment Layer > Levels
Fill in these settings (change them a bit if you want, it all depends on your base)
RGB
0 - 93 - 235
Like in the picture below
You'll get this ->
Layers > New Adjustment Layer > Channel Mixer
RED:
red; 140
green; -50
blue; 0
GREEN:
red; 0
green; 102
blue; 0
BLUE:
red; -10
green; 15
blue; 105
you'll get this ->
Duplicate your base, drag it to the top and set it to soft light. My opacity is at 40%, but it depens on your base, so just play around with the opacity a bit.
->
Merge all; duplicate your base and set it to soft light, desature it, gaussian blur it (radius 1,00)
you'll get this ->
The next step is optional, i made a new adjustment layer > hue/saturation
saturation -> +13
-->
Well, that's it. ^^
i hope it was a bit useful.
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Other icons made with this tutorial: