Apologies if there is already a solution for this (I'm sure there is.) I did a few searches and couldn't find anything.
I'm trying to to change an image's opacity on scroll or gradually darken it with a black backgroundColor at 0.3 opacity. I've had no luck so far, so any suggestions would be much appreciated. I've only been able to get a black bar over the image in the dimensions I want, but not set the proper opacity.