I have the same problem as Ignas, I calculated 2 measures that I use in a bar chart. I looked at the functionality that you presented but I don't have it, I think it is because I don't use the right version of Qlik Sense. I have tried to create expression to change the color but it doesn't work.
For example, I have 2 measures that I calculated before : measure_1 and measure_2 and I want different color for both. So I tried this expression : if ( (measure_1),green(),red()) -> if it is measure_1 I want to put the bar chart in green and if it is measure_2 I want to put the bar chart in red, but it didn't work.
Do you know how can I do that, I think it is the same issue that Ignas has.