I'm trying to modify the colours of the bars in a stacked bar chart through a custom theme.
The null bar seems to be always in one colour by default. The "nullColor" value in the theme json file seems to only take just one colour.
I've tried putting multiple colours in through a list, but to no avail:
Do null bars always have to be in one colour or can they be styled to colour differently by measures? In other words, is there a way we could style the bar in the centre here the same as the ones on the left and the right?