I'd pull out the grey from the zebra stripes.

You can do the other walls white and art could be letters or numbers on Black ...

Babies don't see color till they are 3 to 4 months old, they only see black and white ... and then you can do the art on different primary colors for the baby to discovery ..You can do letters , geometric figures

or the shape of animals in solid color like the wallpaper and you can find those in craft store like Michaels

I like white on walls and a pop color on ceiling; yellow or orange turquoise etc. two or three shades lighter than color in wall paper

Love the wallpaper. Any color in the wallpaper will be nice, but I think I might go white and then you could have lots of color injection choices with your accessories - bedding, window treatment, etc. Pottery Barn has a line call Little lions bedding that has many of the colors that are in the wallpaper. Framed prints are from esy. Copper lighting would also be cute and suit the lion's color. All the best.

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