Is it necessary to frame the stovetop medallion with a chair rail? I'm remodeling my kitchen and have 3x6 subway tile in staggered placement for the backsplash, then for the medallion, a mosaic tile four rows deep bordering harlequin tiles within the mosaic. Therefore, the medallion will be flush with the backsplash. My designer is pushing toward a chair rail to add depth, but the chair rails only come in white or cream, whereas my backsplash tile is desert gray by rittonhouse . Any suggestions would be greatly appreciated. Thanks.