I need to get the hex color value corresponding to Highcharts.Color(data[i].color).brighten(brightness).get()
I need the JS to get the hex color value corresponding to Highcharts.Color(data[i].color).brighten(brightness).get()
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You can use color.rgba, and convert it to hex using .toString(16). http://jsfiddle.net/ubk85f3u/.