Although the B6 is not shown in natural light, the colour looks the same as my 530 xd Touring which is Monacoblau.
I did look at ordering Azuritblack for my Touring, and almost did but got vetoed by the missus who thought it was "too black and not blue enough". Azuritblack is essentially a black base but with blue metallic particles. Monacoblau is a blue base with silver metallic particles. Both colours are deep and elegant, but I think the Azuritblack is really special