That would be because the outlines themselves are not the same colors, just the blue/white and black/yellow sections. Here’s an image I quickly edited with the outlines and skin removed, so you can see just how much an effect they have on the image. Both dresses still look normal, but they no longer look like completely different colors when compared together this way.
(edit): And here’s the same image with the outer boxes removed, to show how much the lighting is affecting things, where one of the dresses just looks completely wrong to me now.
That would be because the outlines themselves are not the same colors, just the blue/white and black/yellow sections. Here’s an image I quickly edited with the outlines and skin removed, so you can see just how much an effect they have on the image. Both dresses still look normal, but they no longer look like completely different colors when compared together this way.
(edit): And here’s the same image with the outer boxes removed, to show how much the lighting is affecting things, where one of the dresses just looks completely wrong to me now.