Very clever blending of the 3 images for style.
What I really like about this though is that you've taken things that "shouldn't" work and put them together in such a way that they hang together perfectly.
- Normally selective colouring on graffiti feels a bit too predictable and almost like shooting to a formula. Not here though - it seems to sit very naturally within the image.
- You also have a very strong diagonal leading line in the staircase, and usually having this take your eye up and out of the right side of the frame would distract and irritate - but somehow it doesn't, it just works. I think because it's counterbalanced by the coloured graffiti at the bottom.
What this has done is deliver an image where your eye starts at the bottom with the graffiti, is led away from it by the staircase and then is drawn back down by the splash of colour. Neither the selective colouring nor the leading line dominates the shot and in fact they compliment each other.
At the same time the fact that it's not a conventional composition or approach to PP (having 2 different styles of B&W combined) gives it a slightly uneasy, menacing feel which works brilliantly.
The only think I'd like to see done differently is the light at the top of the staircase. I like the starburst, but is that the moon behind it? It's just a little too much for me.