Sour Blueberry pours a deep aubergine with the darkest pink fuschia head we've ever seen. Aroma is purely Petrus Pale, that sour funk, with no hint of blueberry to be found. The taste is interesting in that we couldn't pick up any blueberry, but did get a very floral rose and basil at the front, and a mild oaky bitterness at the back. It's not particularly sour, but there is a drying tartness to it on the finish. The carbonation is there and the mouthfeel is pretty smooth.