If you stare at the blinking pink dots, you will see only one color, pink. If you look at the the + in the center, you’ll see a circle of pink dots and a rotating green dot.
Now, stare at the + without moving your eyes. The pink dots will disappear and you will see only a rotating green dot.
Your brain will see the complementary colour of pink: green
Links to Colour Theory Homepages:
How to Mix and use Color by Tony Paul- online book- click here