DaisyDo said: To me, J. S. Digit looks to be much more of a red-violet than any you have pictured.
Scroll down to see all the pictures of it Reticulated Iris (Iris reticulata 'J. S. Dijt') .
Good luck IDing yours.
Daisy, I agree that colors are hard to determine. And my color vocabulary is terrible. I have print books with photos of some cultivars that show J.S. Dijt to be a possibility. Others posted on the Iris Encyclopedia look too light. Some look like matches. It seems the location where it is grown has a significant effect on the plant-or even possibly the year it is grown. I know when I take photos they are RAW formatted and need to be "processed" before they can be posted. That is pretty subjective to my mind. A color card photo would tell me what I need to do, but I don't have one (yet) and I don't have any flowers to photograph till next year. And the settings on each person's monitor/(Edit) screen will have a great effect on the photo. It can get pretty complicated.
