Colour area between two lines with two colours
I'd like to color the area between two lines with two different colors depending on which line is above the other one.
I managed to only color the "in between" part by making it a stacked area chart and using "line 2 - line 1" as expression for the second line. But when I use the the expression "if line 1 > line 2, red, green" it colors the area based on the overall result not per dimension value.
Is this possible?