Set color zones based on other series value

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Javascript

HighCharts

Hi, I have a column in my chart generated using highcharts. Currently I want the color of the column and spline to become red if the value of spline is less than 80.
So I have the codes as below:

series: [{
    type: 'column',
    name: 'Total Built',
    data: _TotalBuilt,
    zones: [{
        value: //based on value of _QuantityOrder,
        color: 'red',
    }]
}, {
    type: 'spline',
    name: 'Size',
    data: _QuantityOrder,
    zones: [{
        value: 80,
        color: 'red',
    }]
}]

I have no problem getting it painted red for _QuantityOrder. But how do I do the same for _TotalBuilt in which its color will based on the value of _QuantityOrder.
For example, if _QuantityOrder is less than 80, then color for column of _TotalBuilt will also be red.

Thank you.

What I have tried:

1. Looking for online solution but its not what I want.