[Solved]-HighCharts: How to combine custom colors with gradient-Highcharts

Use your colors in map instead of Highcharts built-in ones:

colors: Highcharts.map(<?echo $myColors;?>, function(color) {
    return {
        radialGradient: { cx: 0.5, cy: 0.3, r: 0.7 },
        stops: [
                [0, color],
                [1, Highcharts.Color(color).brighten(-0.3).get('rgb')] // darken
        ]
    };
})