It's lovely, Lien! It has strong species characteristics, so I had to look it up. The name is correctly:
Catt. Granier's Blue Elegance. 'Natalie' was just awarded the AM/AOS in Oct 2005. The same plant was awarded an HCC/AOS in 2003, so I'm guessing yours is a division of the awarded plant.

It's a cross between two primary hybrids and is:
25% bowringiana
25% loddigesii
25% gaskelliana
25% warneri

McJulie