Nantucket White is a similar color and try Valspar's Ultra White for a similar trim color.
Note - white base under the pickets
Staircase, natural wood steps, white spindles, black hand rail
dark rails and posts with white spindles
I like the black-painted handrail over the white balusters and natural dark wooden floors but I would not have painted the newel posts black.
railing white spindles: I think to formal?
dark banister, white risers, white spindles
looks OK. white risers, white ballusters, wood railing with over the post style