"No," Wallie says, but he's surprised, and definitely interested. "Does it seem that way to you?"

That's fascinating, if it's true. Colour seems so subjective, but it can't merely be Ned's eyes; it would be unchanged from his perspective. Could the quality of light, its effect on colour, could that vary from universe to universe?

This isn't remotely Wallie's field, but it's still incredible.