There does seem to be a bit of a purple in azure:
If you feel like reading, there is a 15 page thread on the subject over at Britmodeller:
http://www.britmodeller.com/forums/index.php?/topic/51881-blue-blue-my-love-is-azure-blue-now-with-the-new-humbrol-157/
Yea, better brew a pot of coffee -
regards,
Jack