Beautiful wallpaper

Gorgeous foyer! I just love it!! Can you also post a picture of the tiles you mentioned? Paint can be very tricky to recommend online because it can look very different under different lighting and with different furnishings. I would say to pick a few options and definitely paint on big foam boards from the dollar store. Move the boards around as the light shifts throughout the day. Take BM Edgecomb gray as an example, it looks beige in the can, I painted on a foam board and when placed in direct northern light, it looks totally gray. You wouldn’t even think it was the same paint!

IMO white was the wrong choice for the spindles if blending was the plan. Please let us see the tile. I think now it is really important tha you find a color that blens both of those . What colors are in the stair runner ?