I need a blue, daily use ink. I need one that dries fast. I like a darker blue. Any suggestions?

Some fast-drying blue and blue-ish inks:

Dark blue:
Waterman Florida Blue from a wet-writing pen
Namiki-Pilot Blue-Black (more blue than gray; sold in proprietary cartridges only outside Japan)
Sailor Blue
Diamine WES Imperial Blue

Sapphire (a hint of violet makes these "darker" than regular blue):
Diamine Sapphire Blue
J Herbin Eclat de Saphir (Sapphire Blue)

Blue-blacks that aren't too gray or green:
Sailor Blue-Black
Bottled Lamy or Montblanc Blue-Black from a wet-writing pen (iron gall, flush pen every two weeks)
Diamine Registrar's Blue (iron gall, flush pen every two weeks)

Blue-Blacks that aren't too gray and are a bit greenish after drying ("classic"):
Parker Quink Blue-Black
Waterman Blue-Black
Diamine Indigo
Diamine Prussian Blue
Diamine Blue-Black
Rohrer & Klingner Verdigris

Opaque, violet-tending blue:
J Herbin Bleu Nuit ("Night Blue," "Midnight Blue")
Aurora Blue

Have fun!

(Edited for spelling)