Posted on April 14 2026
Choosing the wrong foundation shade is one of the most common complaints clients bring to a makeup chair. And in most cases, the problem isn't the surface tone - it's the undertone.
As a professional makeup artist, your ability to quickly and accurately read a client's undertone is one of the most valuable skills in your toolkit. Get it right, and your foundation work looks seamless and skin-like. Get it wrong, and even the most flawless application can look off. The good news? Once you know what to look for, undertone identification becomes second nature. Here's your professional guide to reading every client's undertone with confidence.
Understanding the Difference Between Tone and Undertone
Before you can identify undertones, it's important to ensure your clients understand the distinction, because many don't. Tone is the surface colour of the skin: fair, light, medium, tan, or deep. Undertone is the subtle hue that exists beneath that surface layer, and it remains constant regardless of how much a client's skin changes with the seasons, sun exposure, or ageing.
Think of it like this: two clients can have an identical surface tone, say, medium, but one may have warm, golden undertones while the other has cool, pink undertones. The foundation shade that looks flawless on one will look completely wrong on the other. This is why undertone identification must always come before shade selection.
There are three undertone categories every makeup artist needs to master:
Cool undertones present as pink, red, or bluish hues beneath the skin. Clients with cool undertones typically burn easily in the sun and rarely tan. Warm undertones present as yellow, peachy, or golden hues. These clients tend to tan easily and rarely burn. Neutral undertones are a mix of both warm and cool, often presenting as olive. These clients may tan well but can also burn.
The Wrist Vein Test
This is one of the fastest and most reliable methods for a quick undertone read during a client consultation. Ask your client to extend their inner wrist in natural light and examine the colour of their veins. Blue or purple veins indicate cool undertones. Green or olive-coloured veins indicate warm undertones. Blue-green veins suggest neutral undertones. This method works well as a starting point, though it should always be cross-referenced with at least one other technique for accuracy.
The Jewellery Test
While not as clinically precise as the vein test, the jewellery method is a useful secondary reference - and it's something many clients already intuitively know about themselves. Ask your client whether they tend to suit gold or silver jewellery better. Gold typically flatters warm undertones, silver flatters cool undertones, and clients who suit both equally are likely neutral. This is a great conversation starter during a client consultation and often reveals undertone information your client may already know without realising it.
The Half-Face Foundation Test
For the most accurate result before committing to a shade, use the professional half-face method. Apply one candidate shade to one side of your client's face and the next closest shade to the other. Step back and assess both sides in natural light. The correct shade will appear to disappear into the skin, looking natural and alive. The wrong shade will appear either too pink and cool, or too yellow and orange. This method is particularly useful when working with new clients or when a client's skin tone has changed seasonally.
Undertones Don't Change - But Tones Do
This is a critical point to communicate to your clients, and one that will save you both time at every subsequent appointment. While a client's surface tone will shift with sun exposure, seasons, and ageing, their undertone remains constant. Once you've correctly identified a client's undertone, you have a permanent reference point. As their surface tone changes throughout the year, you simply adjust the depth of the shade while keeping the undertone consistent. This is why recording undertone information in your client notes is an essential professional habit.
Undertone identification is a foundational skill that directly impacts the quality of every foundation application you do. By using a combination of the vein test, the jewellery method, and the half-face foundation test, you can accurately read any client's undertone quickly and confidently. Master this skill, and your shade-matching will become one of the things your clients trust and return for.