Hi there I have seen this picture and another project you did with the same tiles. I went to the hand crafted place in San Diego as we want to mirror this design. The tiles they gave us for slate look really green not gray and I see in their brochure they have a celadon color also. For this shower do the tiles in person seem green gray versus gray black. Many Thanks and Great design. Also did you have any issues using them in a shower as it says not for use in a wet area