Experimenting with colour theory!
There is no green in this picture, your mind is tricking you and making you see green where there's suppose to be.
What you actually see is a grey between yellow and blue. You know there's green between blue and yellow in the rainbow, so your brain says "let me fix that" and corrects the grey to green.
The human mind is fun to mess with when it comes to colours!

Yep!
TY