Warren: Take your pick from one of the following -
1. Because Blue is the new Black
2. That particular hue and hard light effect coupled with the subtle Gaussian blur on the adjustment layer was chosen to be evocative of the melancholy invoked on the artist by the reminder that we as a species are drowning in our own industrial excrement
3. Cos that's wot appens like when 'ew don't know know what ewe're dooin with the shop of photos!
:-) G.