Ever since I laid my eyes on a Iris Lindy and Iris B, I'm more impressed of
Iris in a Lindy. Iris is a bold color if you're a safe person and in the form of B, it's even more bolder. Iris in lindy looks like a puddle of purple ink.
Bleu de Malte on the other hand stands out in the form of a 30B. Rubis is almost neutral color to almost anything but I like it in the form of Kelly Sellier. Both Rubis and Iris do stand out in the form of a Birkin.
You're a Blue Person and personally, among all, I'd pick Bleu de Malte 30B. It's a unique blue color which compliments with PHW for a modern, crisp look.