Flag Color Optical Illusion

What is the difference between the two shades of green in this optical illusion?

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Scroll down for the answer and explanation.

No Difference. It's actually the same shade of green.

Hard to believe? Cover up the other colors and you will see they are the same.

Explanation

We perceive color based on the contrast with the colors nearby. In this optical illusion, the colors nearby strongly affect the green to make it appear different. This optical illusion shows how important color matching can be and why a paint color that looked so good at the store changes when you bring it home.