I don't grow I Pink I Can, but I do grow Pinking of You, which is the daughter of I Pink I Can. I would regard Pinking of You and Anna Belle Babson as my two pinkest pinks, but of those two, Anna Belle Babson is the one that really glows vivid pink in the afternoon or morning sun.
I also love Beverly Sills for its floriferous vigor, though it is more apricot. I have Vanity, too, but I accidentally stepped on its bloom stalk last year, so I am eagerly awaiting its bloom this spring.
You can compare my photos on the database for Pinking of You, Anna Belle Babson, and Beverly Sills. In the database page for Pinking of You, scroll down for my two photos of it. The photo to the right, showing it pinker, is the more accurate depiction of is color. These photos were all taken with the same camera.
Beverly Sills: clump shot, backlit
Pinking of You (my picture with the more accurate color)
Anna Belle Babson: this is the one that really glows, as you can see by both my shot and Irislady's.
