When using color shift, it’s a good idea to be mindful of which colors are opposing each other. Do not forget that by tinting the object with one, which we then “subtract”, we achieve the addition of contrasting colors to the frame. If it is not clear, remember that the green filter, in this case, will add magenta to the frame, yellow – blue. Orange, as a hybrid of red and yellow, will add green and blue (note that we have quite a lot of red in the face, but the background has become pure blue).
By the way, it is highly desirable to use a test target (as Sergei Rodionov said at the seminar), as well as a preset BB, on it, so that later you don’t have to guess what color the face was.
So, you can always use color shift, as long as you personally (and your viewers) don’t get tired of it. But more often than not, have a goal in front of you in advance. Goals can be different:
You are not satisfied with the background that you want to somehow diversify (our case with gray).
You want to shoot your subject against an interesting pre-sunset background that’s not bad, but you want to change the colors.
You are simply annoyed by the standard color, you want to change something in the surroundings.
You like glitchy colors that you are ready to achieve in any way.