series: [{
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  data: [8394, 9203, 6177, 9658, 8031],
  tooltip: {
    pointFormatter() {
      return '<span style="color: red;">Tooltip for column series</span>'
    }
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}, {
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  tooltip: {
    pointFormatter() {
      return 'Tooltip for the first line series'
    }
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}, {
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  tooltip: {
    pointFormatter() {
      return 'Tooltip for the second line series'
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}]

plotOptions: {
  column: {
    tooltip: {
      pointFormatter() {
        return '<span style="color: red;">Red tooltip for column series</span>'
      }
    }
  },
  line: {
    tooltip: {
      pointFormatter() {
        return '<span style="color: blue;">Blue tooltip for all line series</span>'
      }
    }
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},

series: [{
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}, {
  data: [24916, 24064, 29742, 29851, 32490]
}, {
  data: [49126, 42064, 39742, 58251, 42490]
}]