Pity you have decided against glass in favour of tiles. We have just done our kitchen and I wanted an easy-to-clean surface for the splash back, so the rough surface of grouting around tiles, and also the indentations on some patterned tiles (which collect grease and grime) ruled them out for me! I went for glass, which the manufacturers matched exactly to the duck egg paint colour on the other walls (just gave them a product code of the paint), and although the initial outlay for the glass was expensive, the surface is so brilliant to keep clean and it looks fab as well. I would definitely recommend, and you could match it to, say, your lovely pink/purple ceiling lights ...

Just to offer a different view point. Your floor tiles look amazing. Why not flow the idea through and use tiles of that ilk as your splashblack. We have just recently finished a kitchen with a similar feel and our client opted for patterned wall tiles as their splashback. Based on your comment about the floor being chosen to banish boredom If you are worried about carrying through more of the same tones and want to inject colour, you could always do this through your accessories, that way if you fancy a change.... The colour tones you have chosen provide a great canvas on which to complement or have fun with colour.

Hi Irina! That's a really lovely kitchen, I think perhaps using a natural material with variation will be an excellent finishing touch...have a look at our New York Brick tiles, we keep these in stock in West London can send a sample if you think these could work http://www.stoneandceramicwarehouse.co.uk/wall-tiles/floors/item/new-york-bricks

I agree with Daisy something lighter. I like number 4.