Highcharts chart option backgroundColor:'transparent' showing black on IE 8

Question

Highcharts chart option backgroundColor:'transparent' showing black on IE 8

histogram = new Highcharts.Chart({
            chart: { renderTo: 'histogram', defaultSeriesType: 'bar',
                     backgroundColor:'transparent'
            }

This works fine on I.E 9 and others but fails on I.E 8 and Safari anyone has any idea why ?

Answer 1

Try this solution:

histogram = new Highcharts.Chart({
                chart: { renderTo: 'histogram', defaultSeriesType: 'bar',
                         backgroundColor:'rgba(255, 255, 255, 0.0)'
                }