You know that moment when a foundation looks perfect under store lighting, but once you step outside, it’s suddenly too yellow, too pink, or just off? We’ve all been there. Finding your foundation shade isn’t just about guessing the closest colour, but also about how the product interacts with your skin tone and undertone in everyday light.
The easiest way to tell if you’ve met your match is to test it along your jawline and wear it out for a few hours. Watch how it settles, shifts, and blends throughout the day to determine if it's a true match. To achieve this, the secret lies in understanding both your skin tone and undertone because when they’re in harmony, the foundation should look like skin.
Tip 1: Determining Your Surface Skin Tone
Your surface tone is the first clue in finding your true foundation match and usually falls into one of four families: fair, light, medium, or deep.
When testing, go straight for the jawline for the most balanced read of your skin, bridging the tone of your face and neck for a seamless match.
The main tone categories to know:
- Fair: Porcelain to light ivory tones that may lean pink or peach.
- Light: Slightly warmer and golden, often tanning subtly under the sun.
- Medium: Naturally balanced with olive, caramel, or beige undertones.
- Deep: Rich and multidimensional, glowing from mocha to espresso.
Tip 2: Matching Foundation Colour to Your Undertone
Once you’ve figured out your surface tone, the next layer to master is your undertone, which is the hue beneath your skin that never changes, even when your complexion deepens or lightens. This is what decides whether a foundation blends with your skin, looks smooth, balanced, and believable or stands out awkwardly under natural light.
To identify your undertone:
- Cool Undertone: Skin leans pink, red, or slightly bluish. Veins appear blue or purple, the skin tends to burn before it tans, and silver jewellery complements it best.
- Warm Undertone: Golden, peach, or yellow tones are more dominant. Veins look green in natural light, skin tans easily, and gold jewellery enhances the glow.
- Neutral Undertone: A mix of both warm and cool tones with a balanced, olive-like tint. Veins appear blue-green, both gold and silver jewellery suit you, and your complexion usually adapts easily to different shades.
Tip 3: Selecting Your Formula and Shade
Once you’ve identified your undertone, the next step is choosing a foundation that complements your skin type and preferred finish. The goal is coverage that enhances your features. For this, a well-matched formula should blend seamlessly, feel lightweight, and stay true under different lighting throughout the day.
So, when choosing your formula,consider:
- Matte: Ideal for oily or combination skin. It delivers medium to full coverage and a shine-free, long-lasting finish.
- Semi-Matte or Velvety: A versatile option for most skin types, offering soft coverage that looks smooth yet natural.
- Radiant or Luminous: Perfect for normal to dry skin. It adds a healthy glow and gives the complexion a fresh, hydrated appearance.
If you’re in between, pair a luminous base with a light dusting of matte powder to give you a natural glow and control in equal measure.
Tip 4: Testing Foundation Against Bare Skin

Before any foundation can truly prove itself, it needs a fair test. Always swatch on bare skin with no primer and no moisturiser to see how the formula behaves on its own. This gives you the clearest sense of the tone, texture, and how the shade settles and adapts on your skin throughout the day. Apply a small streak and give it a few minutes to settle; the shade that disappears without blending is your best match.
If you self-tan often, test after applying it. Your base should complement your tanned tone, not your natural one, for a seamless finish that carries from face to décolletage.
Tip 5: Swatching Shades in Natural Light
As mentioned, lighting can completely change how your foundation shows up on your skin. This means that those store mirrors under harsh bulbs won’t give you the full picture, so take the time to step outside. Apply three shades side by side along your jawline and let them blend slightly into your neck.
Check the swatches in natural daylight, and not under fluorescent or bathroom lighting. The right shade will create one continuous tone between your face and neck.
Tip 6: Testing on the Right Body Part
What most people get wrong is that your hand is not the place to test the foundation. It’s usually lighter (or darker) than your face, so what looks perfect in-store might turn out patchy during daily wear. Instead, swipe a few shades along your jawline and blend slightly into your neck for the most accurate read of how your foundation blends with both your face and body.
If your face and chest are slightly different tones, test near the centre of your upper chest. You’ll get a more realistic match that ties your look together without any harsh foundation lines.
Our Best Foundations for Every Skin Tone
Ever wondered why some foundations look flawless in the store but off once you’re outside? The secret lies in finding the right formula.
JUNGSAEMMOOL’s foundations are designed with a makeup artist’s eye for balance, merging skincare benefits, seamless coverage, and precise tone harmony. Whether you’re after a sheer glow or a long-wear satin finish, every cushion and powder foundation enhances your natural skin.
1. Essential Skin Nuder Cushion
A K-beauty favourite for good reason, the Essential Skin Nuder Cushion delivers the soft, radiant finish that defines Korean makeup artistry. Its moisture-fit texture creates a luminous veil that brightens your natural tone while keeping skin hydrated and smooth. Natural to medium coverage allows your complexion to shine through.
2. Essential Skin Nuder Longwear Cushion
For days that demand lasting perfection, the Essential Skin Nuder Longwear Cushion delivers an all-day, crease-free finish from the moment you apply it. Its soft matte finish smooths uneven texture, controls excess sebum, and holds its shape without settling into lines or dulling your glow. Lightweight yet durable, it adheres like a second skin, leaving you with a shine-resistant base that holds from morning to night.
And with up to 24 hours of long wear, your skin tone stays clear, even, and consistent, just like your first application.
3. Skin Nuder Cover Layer Cushion
The Skin Nuder Cover Layer Cushion perfects the balance between high coverage and an airy, skin-like finish. Its ultra-fine powder particles layer delicately, evening out texture while maintaining that signature JUNGSAEMMOOL radiance. Infused with hyaluronic acid and ceramide, it keeps the skin hydrated within while feeling velvety smooth on the outside, creating the look of naturally refined skin that lasts all day.
4. Masterclass Radiant Cushion
Inspired by the techniques of professional makeup artists, theMasterclass Radiant Cushion delivers a high-glow finish that looks polished, not greasy. Its formula is powered by 100 percent ampoule, giving you the benefits of skincare and cushion foundation in a single step. The triple-layer moisture ampoule formula also enhances luminosity and floods the skin with hydration while improving skin elasticity and tone. Complete with SPF 50 / PA+++ protection, it keeps your complexion looking fresh, dewy, and protected under any light.
5. Pro-lasting Flawless Fit Mesh Cushion
Ultra-thin, breathable, and made for all-day wear, the Pro-lasting Flawless Fit Mesh Cushion creates a smooth, semi-matte base. Filtered through a fine mesh, it delivers thin, even layers that feel breathable while still giving buildable coverage. The semi-matte finish keeps shine in check, and the hydrating formula helps the skin stay smooth without caking. With sweatproof and waterproof wear plus expanded shades including the new Snow tone, it’s a go-to cushion for a clean, long-lasting look.
Find Your True Match with JUNGSAEMMOOL
Still wondering how to find your true match foundation shade or whether your base should be lighter or darker than your skin? Take the guesswork out of it with a Shade Matching Service at our Flagship Store.
Our Beauty Advisors will assess your skin tone, undertone, and texture preferences, then guide you to your best match across our signature Korean beauty products and Korean makeup products. Discover your perfect base, from sheer radiance to longwear coverage, and experience what it means to wear a foundation that feels truly your own.