0. Prepare your base by sharpening, blurring, blah blah blah.
1. This tutorial works best on lighter pictures. If yours is a bit dark, then you may need to duplicate and set to SCREEN. Mine was okay as it was, so I duplicated and set to SOFTLIGHT 100%.
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2. Create a new layer and fill with # 000b39. Set to SOFTLIGHT 100%.
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3. Duplicate this layer [1] and set it to EXCLUSION 100%.
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4. Take this texture by
colorfilter and set to SOFTLIGHT 100%
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And that's it!