Any variety called "lavender" is based on the lavender gene (Lav).
Any variety called "blue" is base on the blue gene (Bl).
Here is the kicker...
The APA/ABA variety called "self blue" is actually lavender, as in based on the lavender gene (Lav).
I know it doesn't make sense here in the 21st century, but the APA/ABA refuses to get with the times.