CyndeeCyanide
Posts: 95
Location: Milwaukee.
Current Hair: Pastel and Neon Pink.
To get more blue, use a toner after you bleach to get out the unwanted yellow.
As for other dyes, if you decide you are absolutely in love with the turquoise, use Punky Colour Lagoon Blue, preferably the Punky Pro version, if you can get your hands on it. But as I said, make sure you're in love with it, because it is almost impossible to get rid of. I had a friend who had it in her hair for maybe two months, and it barely faded. It even managed to hang on through two bleachings. But if that's the colour you want for a while, Lagoon Blue's an excellent alternative to Fishbowl, which needs touching up every couple weeks in my expirience.