There's an entire subreddit devoted to a technique for fooling the brain into thinking an image is pornographic by overlaying patterns that obscures clothed sections [1] (and at least one more about more generic optical illusions)

Not quite the color balance, but how anyone can assert the brain is hard to exploit is beyond me.

[1] it's this technique - links is probably nsfw: https://richardwiseman.wordpress.com/2010/09/07/naked-women-... - I don't remember the name of the subreddit.