Singin' the Blues

Azure 'n' Alice Blue, 
Baby 'n' Bice; 
Cornflower, Cobalt...
(Cerulean's nice). 
Delft Blue 'n' Dodger Blue, 
blues play'd by Duke, 
plua blue is the hue
of the blue whale's blue fluke. 
Eton, Electric Blue, 
French 'n' Fluorescent. 
Glaucous, which acts 
as an antidepressant. 

   (more blues to come; a work in progress)