Can you please explain others how did you arrive at the image containing the text "MD5" from the challenge image? Otherwise, casual viewers may think that the word has been painted by you & thus will fail to have the true essence of challenge #2.
Shortly, I think that pictures are not necessary:
The phrase "Can you look through it?" in the first post gave me the hint that something is "unusual" in the picture.
I opened a .BMP copy in HxD and saw, that there was not only the 0x00FFFF color, but also the 0x01FFFF color which on the screen looks 99.9999 % identic.
I changed the 0x01FFFF to 0x0000FF (pure blue).
BTW: Unfortunatelly I did not have had success in downloading the "original" picture, and therefore I was not able to retrieve the correct MD5.
Or, with the current knowledge, maybe only the UC / LC issue reported by Icecube, prohibited me to input the correct code.