Chart series tooltip edge / border colour

I have a chart with a number of different Column series on. For each of these, I am setting a different bar colour using the "Fill" property. This works but, when I hover over a bar, the tooltip is shown with a border / edge colour which doesn't match the fill set on the bar. Is there a way to change the border / edge colour of the tooltip to match the bar fill colour? Two examples:

Bar coloured blue but, tooltip border / edge coloured an orange:
Bar coloured green but, tooltip border / edge coloured a golden yellow:

No, this is currently not possible.