I am working on Highcharts and trying to add inner shadow. Please help. Expected output would be as followings:

Please note the rounded edge of the yellow bars and shadow in the gray bar.

Here is what I have tried:

data: [{
    y: @ViewBag.FinalPer
}, {
    y: 100 - @ViewBag.FinalPer,
    color: '#e3e3e3'
}]