Take a look at Don Rawson's hosta lists
http://www.pwk.resteddoginn.ca...
One of them is of blue hostas.
Or Google "blue hostas". You'll find lots of info. Then, if you want more info, look up each variety using Google or the Hosta Library. Only you can decide how blue you want them to be, how large a mound or leaf, what shape of leaf you want and whether you want them to be wavy or not or whether you want a hosta that is variegated but with a lot of blue in it.
Good luck, but be careful. It can become addictive.
Ann
