Banned for thinking that the ferns in my avatar are the same colour as the maple leaf in yours is. Clearly they aren't.
Unlike the two squares labelled "A" and "B" in the image below, which are indeed the same colour and shade (I kid you not).
(Credit: Edward H. Adelson, via Optical Illusion World)
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It is easy to go down into Hell;
Night and day, the gates of dark Death stand wide;
But to climb back again, to retrace one's steps to the upper air –
There's the rub, the task.
– Virgil, The Aeneid (Book VI)