Manganese Blue Hue, made from the same pigment as the Phthalo Blues but designed to mimic the original Manganese Blue, a toxic color that has mostly been removed from major lines. Original Manganese Blue was a non-staining, liftable, and granulating light blue.
It happens to be a day with a beautiful blue sky as I write this today, so I can compare my blue paints to the sky in to real life. Which one will win??