Well, if Heisey did their Cecilia vases (6", 9" or 10.5") in their Steigel blue colour, that might have been a possibility. But, according to Heisey Glass- 1896-1957, they only did them in crystal (clear) and zircon (a sort of variable light turquoise). Tiffin's Swedish Optic in copen blue is also too light.
Oh well. Not much help then, sorry.
Edit: Sorry Ivo, we crossed there.