I was trying to edit the following picture in GIMP when I noticed something strange.
When seeing the picture in a small thumbnail size (around 64x64) in Google Images, I saw that it was simply a red square with some text, but here in GIMP it looks like the red in the sides is darker than in the middle, like if there were a gradient from the inner to the outer. But I can confirm that the red is plain #CE0400 (206, 4, 0) apart from some places where JPEG compression turned it to weird brown. Definitely not a gradient.
- Am I crazy?
- If not crazy, why is this effect happening?