This is pretty cool. The most famous paintings by Van Gogh looked very different when he actually painted them.
Turns out that the red paint he bought was like the cheap stuff you get at WalMart not the classy stuff you get at Michaels. So the blues used to be purple, and the reds and pinks have turned white. That blanket must not be red. I bet it's something like burnt sienna.
The good folks at Shell Oil Company did the research. I'm not sure why this increases the cost of gasoline but I'm sure it does. Thanks Shell Oil!