Truly blue

Blue milkweed (Oxypetalum caeruleum or Tweedia caerulea) is a new flower for me. It is really incredibly blue, looks almost artificell. What a sweetheart.
I bought it as a cut flower, but it is more common as a potted plant here in Sweden. It can be used for planting in the garden in the summer. However, it is not hardy in our climate.