Blue vs Green Veins: What the Vein Test Says About You

Blue vs green veins is the fastest undertone check there is. Look at the inside of your wrist in daylight. Blue or purple veins suggest a cool undertone, green or olive-looking veins suggest a warm one, and a mix you can't call suggests neutral or olive. It takes ten seconds, but it is a hint rather than proof, so confirm it with one or two other tests.

How to do the vein test properly

The test only works if you control the light. Most bad readings come from doing it in a bathroom or under a desk lamp.

1. Stand by a window with indirect daylight. Late morning is ideal. Avoid direct sun, which washes color out.
2. Wash off any self-tan, lotion with shimmer or tinted sunscreen from your wrist.
3. Turn your arm over and rest it, palm up, on a white surface such as printer paper. The white gives your eye a neutral reference.
4. Look at the veins just below the base of your palm, where the skin is thinnest and sees the least sun.
5. Glance for a few seconds, then look away and look back. Your first impression is usually the most useful.
6. Check the other wrist too. If they disagree, that is a clue in itself.

If you can't see your veins clearly, don't squint or press on your arm. Faint veins are common and simply mean this test is not the one for you.

Blue vs green veins: what each color suggests

Here is how the main vein colors are usually read, and what to try next for each.

Blue veins

Clear blue veins point toward a cool undertone. Your skin likely has a pink, rosy or bluish tint underneath. If silver jewelry also looks brighter on you than gold, the cool reading is getting stronger. Cool seasons such as Cool Summer and Cool Winter are good places to start reading.

Purple veins

Purple or violet veins also lean cool. Some people see purple when the skin over the vein has a rosy tint, which shifts the blue toward red. Read purple as cool unless your other tests disagree.

Green veins

Veins that look green or olive point toward a warm undertone. Your skin probably has a golden, peach or yellow tint. If cream suits you better than bright white, that supports it. Try reading Warm Autumn and Warm Spring.

Mixed veins, or blue-green

Some veins look blue and others green, or every vein sits in a teal in-between. That usually means neutral: your skin does not lean strongly either way. It can also mean olive, especially if both gold and silver look slightly off on you. Soft seasons such as Soft Summer and Soft Autumn often suit neutral and olive skin.

Veins you can barely see

On deep skin, on skin with more fat under it, or on some very even complexions, veins can be close to invisible. That says nothing about your undertone. Skip straight to the confirming tests below.

Why your veins look colored at all

Your veins are not actually blue. The blood inside them is dark red. What you see is the vein filtered through layers of skin. The way skin scatters and absorbs light, plus the contrast with the skin around it, makes the vein read as bluish.

That filtering is the whole idea behind the test. Your skin's own tint sits on top, like a colored glass over the vein. A golden or yellow tint over a bluish shadow mixes toward green, the same way yellow and blue paint do. A pink or neutral tint leaves the blue looking blue or nudges it to purple.

So the test is not reading your veins. It is reading your skin, using the vein as a backdrop.

Why the vein test is a hint, not proof

Because the vein color depends on so many layers, plenty of things besides undertone can change it.

• Skin thickness. Thin skin shows veins clearly and bluer. Thicker skin hides more and can mute everything to grey-green.
• Depth. Deeper skin holds more melanin, which can hide veins or make them read darker and harder to name.
• Lighting. Warm indoor bulbs push veins toward green, and cool LEDs push them toward blue. This alone can flip your answer.
• Your eyes. Blue-green is a hard color to name, and two people can call the same vein different things.
• Sun and redness. A tan on the wrist or a flush of warmth from exercise can tint the skin and shift the reading.

None of this makes the test useless. It just means one wrist in one light is a single vote, not the final word.

Better tests to confirm your result

Run at least two of these in the same daylight. If they agree with your veins, you can be fairly confident.

Gold against silver

Hold a gold piece and then a silver piece against the inside of your wrist or your collarbone. Whichever metal makes your skin look smoother and less blotchy is your lean. Gold suggests warm, silver suggests cool.

White against cream

Hold bright white paper under your chin, then ivory or cream. Look at your skin, not the paper. Clearer in white leans cool. Healthier in cream leans warm. Slightly grey or green in both is a strong sign of olive.

Two lipsticks

Swipe a coral on one side of your lips and a blue-red or berry on the other. The side that looks like your own lips, only brighter, is your direction.

Fabric draping

Hold a mustard (#C49A2C) scarf under your face, then a fuchsia (#C2185B) one. If mustard makes you look rested and fuchsia looks harsh, you lean warm. If fuchsia looks fresh and mustard makes you look sallow, you lean cool.

The undertone test wraps these checks into seven questions and gives you a warm, cool, neutral or olive result with colors to try.

What to do with your result

Once your vein reading and at least one other test agree, you have a working undertone. Use it to pick metals, foundation labels and the color family you wear near your face.

Undertone is only part of the picture, though. Your depth, hair and eye color decide how light or deep and how bright or soft your best colors are. The color analysis quiz combines all of it into one of the 12 seasons. For the depth half of the question, see what is my skin tone.