Highcharts chart option backgroundColor:'transparent' showing black on IE 8
Solution 1:
Can you try this -
backgroundColor: null
See on: jsfiddle
Solution 2:
Try this solution:
histogram = new Highcharts.Chart({
chart: { renderTo: 'histogram', defaultSeriesType: 'bar',
backgroundColor:'rgba(255, 255, 255, 0.0)'
}