Here's a breakdown:

* pH scale: The pH scale measures the acidity or alkalinity of a solution.

* Neutral: A neutral solution has a pH of 7.

* pH paper: This paper is treated with indicators that change color depending on the pH of the solution.

* Green: Green is the color associated with a pH of 7, indicating a neutral solution.

Remember, the exact shade of green can vary slightly depending on the specific type of pH paper used.