Thank you very much guys for expressing your view.
@flowrider I used the room because is the only room in my flat that has, just enough, space to do something like this. Studio was out of the question as I don't have the money to spend on one. My daughter is away studding, so it was a good opportunity to use her half empty room
@frugivore For the blue colour - first I have setup my camera WB to fluorescent (i think, i'm a bit more familiar with the icon than the exact name), then, on the model right - there is the door for the room (I had it open) where I setup one bear flash with blue gel, very low power, bouncing at the ceiling of the room. On her left I had a beauty dish with blue gel, used as a rim light and also one over head light with blue too. Now keep in mind that the space we were shooting is small, so I've got light bouncing all over the place - the one from the beauty dish and the overhead, this was also the reason to have the flash, bouncing at the ceiling, setup on very low power.
Buy the way for the darker look - yes it is a low key darker mood, but also I have noticed that the image is displayed differently on a different platforms, for example you can have a look at this places - by far FB has the worst image compression.
Instagram looks ok.
500px - for some reason displays the images very red.
And on my monitor, while editing, is completely different story.
Go and figure it out