A flower, the stuff looking blue are the bluish violet

Flower arrangement
DSC_0295

As for the thin pink flower, a liatris, the leaf of the background are spiraeas a rose, one touching a blue flower earlier of the stem. The color of the rose assumed it pink for the time being, but the faint orange shows it and seems to be tinged with cream and is delicate. However, what I do not understand even if I say anything seems to touch a small blue flower in the liatris f photograph a lot, but is purplish red when I see the real thing. When it makes a photograph, I look like a flower of the blue. I do not know why it seems to be. By the way, the place of origin of the liatris is from June through September at the time when a flower blooms in North America.