looks great, good atmosphere but feels a bit flat.
seems like that downlight could cast more light.
then the lighting on the doors is a bit confusing where it comes from and how its symmetrical.
if light is shining through maybe move the light where we can see it on one side then close one of the doors a bit so u get to shine it through that side.
the colours r great im no expert on that but i feel like u could scatter 2 or 3 small hues around the place.
for example on the wall around the stairs u could change the darker blue to dirty green-yellow just to break up the monotomy but still retaining the continuity.
and maybe the light inside the room is a different colour so only the lighter blue gets changed in there,or just the highlight or something?