Picking a hair colour from a photo is easy. Picking one that actually suits your colouring — so it looks like it belongs on you rather than borrowed from someone else — is a slightly different exercise, and it starts with understanding your undertone.

How to read your undertone

Undertone is the subtle warm, cool or neutral cast beneath the surface of your skin, and it does not always match how light or dark your skin is. A few simple, informal checks help:

  • The vein test — look at the veins on the inside of your wrist in natural light. Greenish veins tend to suggest warm undertones; blue or purple veins tend to suggest cool; if you genuinely cannot tell, or you see a mix, you are likely neutral.
  • The jewellery test — if gold jewellery makes your skin look brighter and more alive, that leans warm. If silver does the same job, that leans cool. Looking equally good in both is another sign of a neutral undertone.
  • How you tan or burn — skin that tans easily and rarely burns often leans warm; skin that burns before it tans often leans cool.
  • What you already look well in — think about clothing colours people compliment you in most. That pattern usually points to your undertone too.

Warm, cool and neutral colour families

Once you have a general sense of undertone, it becomes a useful filter for choosing a colour family rather than a single exact shade:

  • Warm undertones often look especially rich in golden blondes, honey and caramel tones, warm chestnut and copper-leaning browns.
  • Cool undertones often suit ash blondes, cool-toned browns, and rich, neutral-to-cool darker shades without an orange or gold cast.
  • Neutral undertones have the most flexibility and can usually carry shades from both families reasonably well, adjusting the exact tone to taste.

Eye colour and your natural level of depth (how light or dark your hair is to begin with) also factor in — very light eyes and skin often look striking against deeper colour for contrast, while some people prefer a softer, closer-to-natural approach that reads more low-key day to day.

Level and tone, in plain terms

Two words get used a lot in a colour consultation. Level is simply how light or dark a colour is, usually described on a numbered scale from black to palest blonde. Tone is the warmth or coolness within that level — two colours can share the same level but one leans golden and the other leans ash. Undertone matching is mostly about getting the tone right, not necessarily changing the level at all.

How far from your natural depth is realistic

As a general rule, staying within two or three levels of your natural depth is the most low-maintenance route — it blends with your regrowth more softly and needs less frequent correction. Going much lighter or much darker than your natural colour is entirely possible, but it usually means more frequent salon visits, more careful aftercare, and, for big jumps toward lighter, sometimes more than one appointment to get there safely. That is worth factoring into the decision alongside how the colour looks against your skin.

Testing a shade before you commit

A few low-risk ways to get a feel for a colour before a full commitment:

  • Hold colour swatches or fabric samples directly against your face in daylight, not under indoor lighting, and see which ones make your skin look brighter versus tired.
  • Start with a gloss or toner rather than a permanent change, which shifts the tone without a long-term commitment and fades out naturally.
  • Ask about a few face-framing pieces first, rather than a full head of colour, to see how a lighter or warmer tone sits near your skin before going further.

A guide, not a rule

Undertone matching is a genuinely useful starting point, not a strict system. Plenty of people wear colours outside their “expected” family and look great, because makeup, styling and personal preference all play a part too. Bring reference photos and an open mind to a consultation, and a stylist can tell you honestly whether a shade you love will need adjusting to work with your colouring, or whether it will suit you as-is.

For more on preparing for that conversation, see what to bring to a colour consultation and how balayage, highlights and foils each place colour differently around the face.

We work with clients from Oak Lawn, Hometown, Burbank and Palos Hills on exactly this kind of colour planning. Read more about our colour and highlight services, or check hours and directions before you book a consultation.