Highchart tooltip does not match series colour - Solid Gauge Chart - highcharts

Question

Highcharts tooltip is not matching the series colour and defaulting to the blue. JS Fiddle shows the issue: https://jsfiddle.net/ap5jxb20/
The colours of the series are defined in the events render function as I require a logic check to determine the colours. How do I apply the same colours to the tooltip?
events: {
render: function () {
var point = this.series[0].points[0];
if (point.y < imorequired) {
point.graphic.attr({
fill: 'green',
marker: 'green'
})
} else if (point.y > imorequired * 1.5) {
point.graphic.attr({
fill: 'red'
})
} else {
point.graphic.attr({
fill: '#ffbf00'
})
}
var point2 = this.series[1].points[0];
if (point2.y > 0) {
point2.graphic.attr({
fill: 'green',
marker: 'green'
})
}
var point3 = this.series[2].points[0];
if (point3.y < imorequired) {
point3.graphic.attr({
fill: 'green'
})
} else if (point3.y > imorequired * 1.5) {
point3.graphic.attr({
fill: 'red'
})
} else {
point3.graphic.attr({
fill: '#ffbf00'
})
}
}
}

Answer 1

In this case, Highcharts uses point.color to define the color in a tooltip, so as a solution, update also a point.color property.
chart: {
type: 'solidgauge',
events: {
render: function() {
var point = this.series[0].points[0];
if (point.y < 4.27) {
point.color = 'green';
point.graphic.attr({
fill: 'green',
marker: 'green'
})
} else if (point.y > 4.27 * 1.5) {
point.color = 'red';
point.graphic.attr({
fill: 'red'
})
} else {
point.color = '#ffbf00';
point.graphic.attr({
fill: '#ffbf00'
})
}
...
}
}
}
Live demo: https://jsfiddle.net/BlackLabel/5Lbt6wqn/
API Reference: https://api.highcharts.com/class-reference/Highcharts.Point#color