There are heaps of 'other' hyacinths too. Two that are blue, and about the same height are Scilla hohenackeri and Scilla bithynica - my spelling may be incorrect, the dog is sleeping on my lap so I don't want to disturb her by getting up to check in a book! They are easy from seed too. I have just sown down seeds of Hyacinthella too.
I got them from Oron P. Then there is always plain, but excellent, Hyacinthus orientalis and the delightful Roman hyacinths. All lovely shades of blue, and best of all they naturalise if they find the situation to their liking.