**Accidental homework** - Advancing and Receding colors that convey different tones and meanings. One is whispering Hello, one is simply saying Hello, and the other is shouting Hello. Can you guess which one? 

I really enjoyed this activity because I have known this optical illusion but to instantly see it happen was cool. After staring at the top square with purple and yellow-green, you will notice an "after image of perceptual complementary colors." After that, you will notice that the below yellow- green and purple square appear more vivid.

"When used together, warm, high-value, high-chroma colors appear closer in distance than cool, low-value, low-chroma colors. These are advancing and receding colors." In fewer words, cooler colors tend to recede while warmer colors advance.