Hosta Krossa Regal - extra large, blue vase-shaped hosta, very elegant, color of plant varies with amount of sunlight. With more sun it is more green than blue. Hosta Krossa Regal is one of the more popular types of blue hostas. This host is growing in a mostly shady area and is more of a blue hosta than a green one.
Blue Hawaii - Blue hostas hold their color better in cooler climates and we have read articles of blue hostas being green by the end of May in the south. Description from nhhostasdatabase.com. I searched for this on bing.com/images