"Things You Wouldn't Know If We Didn't Blog Intermittently."
I've seen this illusion before and it "worked" for me, the way one thinks it is supposed to. But I just got a new monitor and on that, it doesn't work. The green almost works. The red doesn't work at all. (Of course if you look at it from across the room, it works.)
That's a lot like the way analog TV worked, a nice sharp b/w image overlain by low-resolution color.