Take a good look at the veins on your wrist under natural light for an easy way to determine your undertone. If your veins look green, it is likely you have warm undertones; if they are blue/purple, you have cool undertones. If they appear blue/green or match your skin colour, you most likely have neutral undertones.
Hold a white sheet of paper against your face and look at yourself in the mirror. If your skin appears yellow next to the paper, your skin has a warm hue and undertone. If your face has a rosy blush, you're cool toned. If you can't determine between the two, you're in the middle with a neutral undertone.
If you're not sure, checking the color of your veins is a quick way to find out. Take a look at the veins in and around your face and neck. If you see blue veins, you have cool undertones. If your veins appear green on the skin (olive), you're warm.
Blend The Foundation Lighter Than You
When in doubt, always pick a shade that is slightly lighter than your complexion rather than darker. This can prevent your complexion from looking darker than the rest of your body. It is the safest way to go when unsure about two shades that may look too light or too dark.
Flip over your arm and take a look at the inside of your wrist. If your veins appear to have a blue or deep purple tint, you likely have cool skin undertones. If they look more greenish, you likely have warm or olive undertones. If you can't tell one way or the other, you may have neutral undertones.
If you're a novice, try a powder foundation that's right for your skin type. "It's the easiest to apply, and it disappears into the skin more easily than liquid formulas," says New York City makeup artist Mally Roncal. Next easiest is a cream foundation in a compact (which is great for dry complexions).
“Bring the bottle up to your neck to try to match the color to your skin, as close as possible,” he says. Then, seek out the area of the drugstore that has the best lighting and mirrors. “Sometimes this is not always the makeup aisle. Look for a place with some natural light seeping through.”
Look at your wrist veins under natural light.
If your veins appear to be green, you probably have warm undertones. If they're blue or purple, you probably have cool undertones. If they are a mix of both, you may have neutral undertones.
In a place with bright, natural light, hold up a piece of printer paper and look at how your skin reacts to it. If your skin looks pinkish against the paper, you probably have cooler undertones; if your skin looks yellow against the paper, you're probably a warm tone.
If your makeup is too light, you will look ashy or as if you have a gray cast on your skin. If the formula is too dark, it can make your complexion look muddy. Look for the shade that disappears into your skin most is your right match.
To find your foundation color match for free, download the YouCam Makeup app, which is available for both iOS and Android.
To find your perfect foundation shade, you should always dab a bit on your jawline and neck first. Checking the color match on your neck and jaw prevents jarring discrepancies and results in the ideal hue.
Don't be afraid to mix foundation shades and try different ratios until you find the closest shade. While mixing foundation can feel a little intimidating, it's really hard to mess up and it's a great way to get the right shade when you're not that far off from the shades you currently have.
The general rule of thumb is that you should always opt for a shade lighter than foundation when choosing your concealer colour. Doing so helps to mask darker discolouration, but be careful not to over-correct! Knowing how to pick the right concealer is essential to ensuring that your look does not appear ghostly.
Powder foundations are a go-to for beginners because they're quick and easy to apply. Boswell says she likes to use powder foundations on oily skin as they can help to absorb excess oil.
What is the colour of your veins? The easiest way to determine your undertone is by opting for a closer inspection of the insides of your wrists. If they appear green, your undertone is warm while blue veins signify cooler undertones. If you can see a mix of both, you likely have neutral undertones.
Check the Color of Your Veins
If they look slightly green, you probably have warm undertones, but if they skew more blue or purple, your undertones are likely cool. If you can't decide and your veins look blue-green or somewhere else in the middle, you may have neutral undertones.
If you've picked the wrong undertone:
If you are COOL and pick a WARM or NEUTRAL foundation, it will look yellow on you. If you are WARM and pick a COOL foundation, it will make your skin look pale and icy. If you pick a NEUTRAL foundation, it will look grey.