After effects

 Lumetri Colour 

I would want to use this during the scene where Carol is murdered and this is to increase the colour saturation especially on the blood so that it can easily contrast with the scene that takes place right after which is dark-based, with shadows and low lights. This would make the mood change faster, meaning the audience will feel almost a heart drop.

Motion blue

This I want to use for when the logo is shown so that it adds instead of the video being more choppy with the logo. The motion blue would make the logo being shown look more casual instead of being a whole separate thing. 

vignette

during the scene where Kevin looks at himself in the mirror, this would add to the mood of it and make it seem more intense and glum.