True, makes it hard to photograph and the difference in monitors and out own eye.We do not all see blue in the same way was the jist of the article. While some of us would see the blue others would see the greenish blue. In addition the light source makes a large difference on how we see blue
The light source is true too, I used to do color compounding(plastic) sample testing for automotive trim, we had to view and compare our product to the master under 4 different lights....the differences were pretty amazing.