Congratulations to Heidi on the banner shot and thanks to Benni for hosting.
I took a photo of this ornament on a gravestone Actually I had to take about 10 shots until I was happy with the result. I don't know what the material is, but it definitely has a blue tinge to it.
This is a so-called meadow sage apparently and it was growing wild in a container in town. Although it is slightly blurred, I quite liked the mixture of being blurred and not blurred, probably my fault with the focus.
There is quite a lot of blue in this photo of the River Aar
This is Siberian Burgloss, and a forget-me-not that is permanent and flowers every year. My sister-in-law gave me a few plants but she said be careful it might take over. It has not taken over, but makes a wonderful splash of blue in spring when it flowers, although it does tend to spread.