turn this:

into this:

STEP 1: duplicate your base layer and set it to screen.
STEP 2: make a new layout and fill it in with #FFFFFF and set it to overlay
its should look like this:

STEP 3: make a new layout and fill it in with #00115C and set it to exculsion
it should look like this

STEP 4: go back to the layer filled with white (layer 3) and take a eraser tool and erase on top of the faces of the people. Merge everything and it should look like this

TIP!! if it is to bright try to bring the opacity down on layer three. the one with the white
please tell me what you think about it and show me examples of your work.