Discussion board where members can learn more about Qlik Sense App Development and Usage.
It's pobbile to change the colour of bar in a barchart by clicking with the mouse?
The user can change some parameters of color i chart at exploration menu.
I don't think think this is what you're looking for.
Or you can make a button (with extension) that manipulate a variable, and this variable manipulate the color of charts through color function.
+1 extra funfact: Did you know that, you can make the pie chart spinning around by using the mouse-wheel?