Blues aren’t usually ones that trip my brain up, but as soon as it starts to really pull into the purple range of colors, all bets are off. Colors that are similar to this sort of periwinkle color are especially difficult for my brain to want to put into a single color group as it is just as much purple as it is blue. For me, this color in particular seems to sit right on the dividing line between the two.
I can also say that my camera did not do the color of these flowers justice. The color in real life seemed just a bit softer and just slightly less purple than this photo shows.