Lighting/Colour/Mood

Lighting - It would need to be quite dark as we want it to feel quite creepy and mysterious.
Colour - Dark colours, blacks and greys
Mood - Tense. The lighting and colours being dark would help this. We could also have quiet slow music in the back ground and high light any diegetic sounds by not letting background music over-power them.
This is the kind of lighting we were thinking about: