Hi all, ok so i have a stacked Area Chart with two values over time, the final result needs to be showing just the upper area, the lower totally invisible. I've tried various combinations and have got as far as editing the lower band colour to make it white, but it is still semi transparent. Cant see where in the theme editor i can adjust that though?

 

How would this be done please? make the lower area with yellow squiggles dissapear visually but still stack the blue area on top of it?