I've only been using AE for almost two years and I am planning to do something different. I've filmed a short video of liquid blood dripping from a hand and splashes of liquid blood in slow-mo. But I want the film to be in monochrome except for the blood. Do you know how can I achieve it? I tried color keying techniques but the edges are sharp(Perhaps due to the tolerance) which is bothering me. Is there anywhere I could make it look better and cinematic such as the ref below?