A lovely lace weight yarn from Lana Grossa, this is a hand-dyed hank with long color sections called Cool Wool Lace (Hand-Dyed). The yarn is 100% merino with 880 yards per 100g skein.
To get an idea of how the colors work up, take a look here (on Ravelry) or here (on Trendsetters website) at some projects knit with it.
This colorway is called simply Magenta Blues (#819). I see sky blue, teasl and magenta as the main colors with some small in-between sections blending colors.