What is it about blue hair that looks so appealing? Maybe it has something to do with all the different looks associated with it. Take, for example, wearing blue hair Beltane-style, with the horns of fertility.
Witches love blue hair - remember in Harry Potter and the Sorceror's Stone when Harry accidentally turned his teacher's hair blue? It's in the book, so if you only saw the movie, you missed out.
Then, of course, there's the Marge Simpson look.
Blue doesn't have to be monotone. You can rock blue hair with subtle shading, and maybe hints of lavender.
You can go bi-colored, perhaps with black.
You could go for the Corpse Bride look, with a wreath of roses.
A bright, shiny apple could make a flattering complement to a blue 'do.
Or you might choose a less traditional accessory. This one reminds me of Sense and Sensibility and Sea Monsters.