Summer Aster - Blooms in purple or violet?

Now we have the lovely summer aster in violet or hot pink or even purple? Sooo difficult to define the colours - even for me as a painter - and additionally all images look different depending on the monitor you have got. What a dilemma!! :)

"Callistephus chinensis" (Asteraceae)
aster, Sommeraster

daily photos from Munich, photography by Petra Voegtle