As the appearance of the garden has a modernist style with the straight lines and concrete furniture how about a Mondrian influence and add a bold strip of blue? It is a pond and with the right shade it could look really relaxed and contemporary. My daughter's suggestion is a chalky lilac!

The blue is awesome (grey is too trendy)! The reason it stands out to you is perhaps because it's the only real colour there. Bring in the blue in a window treatment, a small appliance that sits on the counter, a pretty tray or area rug. Also, it is more appealing often if there are more than 2 colours - so right now you have a white and blue colour scheme - bring in red or orange or fushia - something from the other side of the spectrum (like you did with the yellow flowers but in a more permanent way)!

The taupe countertops are nice. Have you seen all the new choices of backsplash tiles that are available currently? There are so many beautiful ones, there isn't a need to settle on white subway tiles. Venture out to the big box stores or flooring showrooms and take a look... There are tile caps of all sizes to finish off the ends. A nice one is called a tile liner, and it's about 1/2"-wide. There's also metal strips that can be laid in to finish the tile, it looks very nice. They are called: Schluter Systems 0.375-in W x 98.5-in L Aluminum Commercial/Residential Tile Edge Trim and can be found at Lowe's. They come in different colors.

Far out! A revamp was exactly what this garden was looking for. It looks fantastic. I love the beehives as well (if that's what they are, correct me if I'm wrong).