NO SELECTIVE COLOURING!
Involves : curves and hue/saturation
LEVEL : EASY
Start with this base by conspiracyicons
Add 3 layers (all at 100% opacity) and fill them all with #05052e.
Set the first two on screen.
And the last one on subtract.
Merge all visible layers.
Add a new layer and fill again with #05052e and set at screen and 90% opacity.
Merge all visible layers again.
Create a stroke path around the main subject.
I set mine at 2px and at #9fdab4.
Then another one at 1px and at #fafad8.
You can add text...
Mine was Ariel Black, size 23, at #24a28e
The outline was a 3px border at #faffed