Aka 'Blue Bajou" or "Blue-Bijou" Geneticists are hoping to introduce delphinidin, the necessary pigment, into a rose from another flower, meanwhile the rose world have to make the best of mauves and lilacs that are closest to blue.
A well-known rose nursery in Germany has produced this lovely rose that holds its shape well before opening fully and the colour contrasts beautifully with the leaves.
A very pretty bush in full bloom, one of my favourites, but unfortunately the blooms are not long lasting in our climate. Released in 1993.