iMovie green screen need to be green?
She shot a video in front of a solid tan wall. Is there a way to use that with the Green Screen effect? Or do we need an actual green or blue screen?
iMovie doesn't have a color replace feature, as you have found. There are other programs that have that. I think Adobe Premiere Pro does. See this You Tube link:
https://www.youtube.com/watch?v=UDMNtD42INw
-- Rich