A palette that narrows a whole shop down to a shortlist — with a card for your pocket, and an honest account of how much weight to put on any of it.
Two tops, same shape, same size — one gets compliments and the other makes you look tired. Without language for it, you can't repeat the good one.
The useful thing a palette does isn't telling you what's forbidden. It's cutting three hundred options down to thirty so you can actually decide.
Which is too blunt to shop with. What's actually useful is depth, mutedness and contrast — the parts nobody explains.
It's genuinely better — someone drapes fabric against your face in real light. It's also a lot for something you might want to try first.