Black walls can be very dramatic, but I think in the right setting black walls can be cozy and charming too. I always love a chalkboard wall (especially in a kitchen!), but a nice semi-gloss black gives a little sheen to reflect more light — taking this tiny kitchen from small to WOW!
The white cabinets give a great contrast to the walls! Notice the black floors and window mullions too, which also help the cabinets to stand out.
Here is more inspiration on decorating with black!