Gray or Grey?

"Gray is the color of intellect, knowledge, and wisdom. It is perceived as long-lasting, classic, and often as sleek or refined. It is a color that is dignified, conservative, and carries authority. Gray is controlled and inconspicuous and is considered a color of compromise, perhaps because it sits between the extremes of black and white. Gray is a perfect neutral, which is why designers often use it as a background color."

By A.S