Tooltip callback labelColor not being applied

[alexeigs]

Using chart.js 2.9.3 through vue-chartjs 3.5.0.

chart options:

{ ...
tooltips: {
       callbacks: {
          label: (item, data) => 'someLabel',
          labelTextColor: (item, chart) => 'green',
          labelColor: (item, chart) => {
            console.log('I am called successfully')
            return {
              borderColor: 'yellow',
              backgroundColor: 'red'
          }
       }
    }
}

label and labelTextColor work as expected, labelColor get's called but no background or border gets applied.

[etimberg]

@alexeigs all of the tooltip callbacks are nested one level deeper.

tooltips: {
  callbacks: {
    labelColor: ...
  },
}

[alexeigs]

@etimberg Sorry, that was a mistake in copying code. In the actual example it is of course nested one lever deeper. I edited the initial post.

[alexeigs]

It actually gets applied, just not to the background of the tooltip but only the small colored box. Is there a way to apply it to the full tooltip background?

[etimberg]

@alexeigs you can use the background color option, but it's not possible to supply a function for it.

[etimberg]

Closing since the immediate issue was resolved and #7201 takes care of the background option being scriptable