So basically I have a few clips where the sky is a little bluish right before night. In the timeline of the video this scene needs to take place after it's full night. Unfortunately, there was 2 different locations roughly 30 minutes apart and the Director didn't want to wait to shoot the scene until it was completely dark since a few of our talent needed to leave early. Is there a way to color a dusky blue sky into pitch black w/o altering the rest of the clip? Secondary color functions in Apple Color, Garbage Mask, Matte? Any help would be appreciated. Thanks!