GridHelper change cell color

[OlenaAwd]

Hello guys! I'd like to create a grid element, so the user can click on each cell and see the popup with information(something like on screen) So I faced with a problem coloring the cell which is clicked.
I was trying to use ref.current.material.current.set("red") it works for cubes for example, but not for a grid.

Can somebody help with how it works with gridHelper?