Not sure of your undertone?
Look at the veins on the inside of your wrist in daylight. Mostly blue or purple usually means cool. Greenish means warm. If you can't decide, you're probably neutral, which means most shades work on you.
A second test: which jewellery do you reach for? Silver tends to flatter cool undertones and gold tends to flatter warm ones. If both look good, you're likely neutral.
These palettes are a starting point, not a rule. If you love a shade, wear it.