Watch Closely - Neat Trick - Have fun

Is this the same color??

1. See if the two boxes have the same exact shade of gray.
2. It's a NO right?
3. Now cover the middle area where the two boxes meet with your hand or fingers.
4. Now Watch closely.

Interesting right! I am sure you saw what I saw too. I am not sure what the logic explanation to this.. if you have an answer then comment below. And also share this to surprise others too! :)