Gets or sets a color string used to represent the background color of the gray area , such as "red", "#FFFF00", "rgb(255,0,0)", "Accent 5", and so on.

var instance = new GcSpread.Sheets.Spread(host, options);
var returnValue; // Type: Object
returnValue = instance.grayAreaBackColor(value);

function grayAreaBackColor( 
   value : string
) : Object;

spread.backColor("green");
spread.grayAreaBackColor("Accent 2");

activeSpread.grayAreaBackColor("red");