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It may be an oldie, but its a goodie.

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The best way to find your foundation shade is to match to your jawline.

Gerstein recommends trying three different shades, and don’t blend them in.

Just watch them disappear into the neck, she says.

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This will guarantee that the foundations coverage wont look like a mask once you’ve spread it all over.

Indoor lighting can be dark, explains Quynh.

“Natural sunlight is always the best to help gauge what color you are.

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Gerstein agrees, Im always amazed at how much good lighting affects things.

Always, always look outside.

This might sound a little basic, but hold it up in the daylight, explains Gerstein.

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She recommends LOreal True Match formula because the clear bottle makes this process a lot easier.

Reach for three different bottles to see whats closest to your skin tone and head towards the nearest window.

When in doubt, ask for an extra set of eyes to take a look for you.

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Theres no shame in the game, jokes Gerstein.

Live in it for a little bit.

Then if you picked the wrong color, just take it back.

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Stores like CVS, Rite Aid, and Walgreens have a 100 percent satisfaction guarantee.

Just bring it back within 30 days of purchase with your receipt.

No harm, no foul.

So it will almost always look darker on skin than in the package.

To be safe, go a half shade or one whole shade lighter than you think.

Your skin can change tone and color as the year goes on.

But always buy your lightest shade first.

(Its easier to darken foundation than it is to lighten it up.

More on that below!).

Gerstein explains that it should be matte bronzer, no shimmer or highlighter additions.

And as you get more tan, you’re free to keep adding more drops, she says.

Do not drop the bronzer directly into the foundation bottle.

Instead, mix them together on the back of your hand before applying to your face.

Sheer products such as tinted moisturizers and BB creams allow for more leeway when it comes to color matching.

Then the brand will formulate and send your custom foundation to you for $49.

We tested it out, and it works!

The formulation is not only comfortable and easily blendable, but it really does deliver a perfect match.