I just recently painted my MBR palladian blue and I think it is such a wonderfully serene, cheerful color...I just love it. However, in the pic you posted, the Woodlawn (also a very pretty color) looks like a better match to your tiles...but I am in agreement with the others that it needs to be softened/lightened up a bit so that your gorgeous tiles take center stage. You might have already tried it but SW Rainwashed is also very pretty but it is really similar to palladian so not sure if that would be an option for you. Also, what about BM Quiet Moments??? I like the idea of a soft ethereal blue...not so keen on the idea of gray (it would be way too much gray IMO). Let us know what you decide! If you get more samples mixed up, post pics!!

I'm afraid I do see purplish undertones in the Nevermore. I could be imagining it. No. Not imagining the purpleness in Nevermore. Thinking in terms of undertones will only make it more difficult to truly see color for what it is. Things become much clearer - and easier - when you understand that every color belongs to a hue family and undertones are something completely different. Just like LRV, there is a data point for hue family. Once we identify hue family, we can then plot (either physically or just in your head) the color on a color wheel. Like I did in the infographic below. You can see the yellow circle highlights the PB or purple-blue hue family. Do you see where Nevermore Grey is plotted? It belongs to the B or blue hue family and 'lives' overnear the purple-blue hue family. That's why you are seeing overtones of purple. Nothing's hidden or "under" anything. The color simply belongs to the blue hue family over near purple-blue and it's obvious to you. Everything is starting to look blue to me except the Software. Maybe it's because of all the blues around it. Software looks sort of brown in comparison so that's why I was reluctant to give it a chance. When you know what hue family a paint color belongs to, the other colors around it become less influential - because you have a conscious, objective reference for hue. I plotted the other three colors you're now considering so you can see where they 'live' within their hue family. Now, you can compare on TWO data points, LRV and hue family. Here's a list of color data points: hue family, value, chroma, and LRV. When you string all of them together, it's called a color notation. A color notation is an objective second opinion that helps you analyze color. In this infographic, you can see the color notation directly under each color name. Hope that helps. (Revised to correct illuminant)

Flemish bond is great for a floor or patio, not for a backsplash. Both SW 6155 Rice Grain (bottom) and SW 6154 Nacre (top) are yellows, although Nacre is classed as a pastel shade, so the tile color you're looking for is a cream that pairs well with your stone which is largely brown - shouldn't be hard to find. The tile below is Fireclay Tile in Ivory but you can approximate this glaze in almost any other tile. If you have the budget for it, consider a pretty shape. Your space reads young and joy filled. Consider something fun like a mini star and cross, or an ogee drop.

I think you’d like Montauk Blue Slate. You can order samples from builddirect dot com and they’ll arrive lickety split.