Should I match the foundation shade to my neck or my face?

Choosing the shade is the hardest part whenever I buy a new foundation.

It definitely looked natural when I tested it at the store, but sometimes when I get home and do my full makeup, my face just looks like it's floating.

If I choose it to match my face, there is a color difference with my neck, and if I match it to my neck, my face looks darker and duller than usual.

So lately, I’ve started getting confused about which part of my face I should choose foundation for.

I've heard that testing on the back of the hand isn't accurate, and that you should try applying it to your jawline.

Even if it looks natural when applied to the jawline, it can look different under lighting or sunlight.

I am also curious about what criteria people with naturally different skin tones on their neck and face should use to choose colors.

That said, I don't want to make the face look too dark just to match the neck color.

By any chance, when choosing foundation, do you use your face or your neck as a reference?

Please share any tips for minimizing failures when testing in-store, or any criteria for selecting the most natural-looking color during actual use.

I always fail at choosing the color, so I want to pick the right one this time. 😊