This optical illusion is hard to believe…but the Photoshop test bears it out.
You see embedded spirals, right, of green, pinkish-orange, and blue? Incredibly, the green and the blue spirals are the same color. At first I thought Richard was pulling our collective legs, being a trickster of high magnitude. So I loaded the image in Photoshop and examined the two spirals… Like I said, incredible! For pedantry sake, the RGB colors in both spirals are 0, 255, 150. (Discover)