I saved the image and cut the 2 squares out and put them side by side and they are in fact the same yet no matter how much I look at the picture I just can't see the two as being the same shade.
This is really quite cool and I wish I could come up with an engineering application for it.
"A good scientist is a person with original ideas. A good engineer is a
person who makes a design that works with as few original ideas as
possible" - Freeman Dyson