You can tell an amateur grade the same way you can tell cheap software: it's doing too much. Here are the five mistakes we see most often when footage comes in already "graded" by someone who learned from a tutorial.
1. Skintones that went for a walk
People don't forgive wrong skin. Push a grade too teal and everyone looks like a visitor from the moon; too orange and they look sunburned. When in doubt, check a neutral patch or a hand against a reference. If you can't articulate what you did to the face, you haven't graded it — you've filterised it.
2. Contrast pulled to the point of pain
Crushed blacks and blown highlights give an immediate "cinematic" feel, which is exactly why beginners overdo it. The problem is you lose every texture that makes an image feel real — fabric, hair, paper. A good grade keeps shadow detail that you can barely see, because barely visible detail is what separates depth from flatness.
3. Saturation as a mood
Turning the saturation down to make something "moody" is not a look, it's a setting. Real mood comes from how you balance the palette — which colours you cool, which you warm, which you leave alone. Monochrome-lite grading is the fastest way to make a film feel like a student project.
4. Matching scenes to the mood board instead of each other
A grade has to be consistent across the film first, and beautiful second. If scene two was shot on a different day, your job is to make it belong to scene one — not to make each scene match a reference still independently. Consistency is the invisible part of grading, and it's the part clients always notice.
5. Forgetting the skin of the delivery
Everything looks different on a phone than on a reference monitor, and your grade ships to phones. Half the battle is simply checking your work in the format and brightness the audience will actually see — and re-checking the highlights, because screens handle them differently than you expect.
The honest version
A good grade is most successful when it's least noticeable. If the client says "the footage looks nicer," that's fine. If they say "nice filter," you missed. The goal is to make color feel inevitable — like it was always going to look exactly like that.