I need to put a logo to the corner of my video and I want that logo to change color due to my background video. For the dark parts of my video, I want the logo white and for the light parts I want it black. But it will take so much time if I do it with color fill effect's key frames, because the video is a bit long. Also I tried the blending options as well but they don't work for this unfortunately. Is there any way to do it?