I vote for the white. If you use any color in your piano keys, the colors bleed together where they touch and detract from the pattern.
I found my lost pieces, now to find time to work on them. A family member has been diagnosed with kidney cancer and I have been hospital sitting and will have to travel next week for his surgery. When life gives you scraps, make a quilt. Looks like my life is going have another quilt pattern added.