Our current shower has ming green marble on the walls as we enter the shower, but the rest of inside of shower is outdated ceramic. We are keeping our ming green marble surround on tub. We plan on putting in white marble floors and bringing this into shower. The question is should we replace all marble in shower with the white or leave the ming green in shower entrance to integrate with tub surround? Concerned that if we remove all Ming, the shower will not seem integrated with the tub.