Pink on the box I hope... The contents are a nice blue. I deal in primary colors but I believe aqua may be right.
Yep, those plants grow easy around here.
Then they may have changed it. I have Azealea food here that is a pink powder. But the box is five years old.
I generaly use such fertilzers out of desperation as mostly I am organic. But for a fast "emergency " fix they come in handy.
If you have lots of Azealeas and Rhodes, I would assume your soil is fine to go as is. Amend for drainage and nutrition.