[Solved]-Styling bar colors in Highcharts with a gradient issue-Highcharts

There are two ways of specifying gradients in current version of highcharts. Previously you only had the option of using an array with four coordinates like linearGradient: [x1, y1, x2, y2]. This would make the gradient coordinates apply to pixels and therefor be used for all bars (as in your example).

The new option is to use a configuration object instead:

linearGradient: {
     x1: 0,
     y1: 0,
     x2: 1,
     y2: 0
}

The coordinates here are numbers between 0 and 1 which corresponds to each individual bar. So, if you change the array you used to be a config option (and use normalized coordinates) you will get gradients in each bar.

Example on jsfiddle

Screenshot:

Edit: And as a bar chart have the x-axis going from top to bottom you should let x1 be 0 and x2 be 1, instead of changing y1 and y2.