The method setwidth resets the width of selected columns.
color - color value.
var pggrid = new jsgrid();
pggrid.init({
id:"wrp",
rows:5,
columns:12,
width:25,
height:20,
gutter:1,
backgroundColor: "#7fffd4"
});
var grp = pggrid.group([2,4,6,8,10]);
pggrid.setbackgroundcolor(grp, "#fff");