How to Paint a Portrait in Oil

Paint a portrait in oil by building it in one order. Tone the canvas to a middle value. Draw the head as a few large shapes before you touch a single feature. Set your darkest shadow and your lightest light, then fill the values between them. Mix flesh as a run of temperature shifts. Save edges for last. A face reads because the structure under it is right, not because you rendered the pores.

That order is the craft. Most portraits fail in the first hour, not the last, because the drawing and the value plan were wrong and no amount of late rendering rescues a wrong foundation. So we spend our attention early, where it pays.

Tone the canvas first

A white canvas is the hardest surface to judge color against. Brush a thin wash of raw umber cut with a little odorless solvent across the whole canvas, then wipe it back with a rag to a light-to-mid value. Let it dry. Now every mix you lay down sits against a neutral, and you can read warm against cool honestly. White grounds make good flesh mixes look dirty. The same mix on a toned ground looks like skin.

Here is a working palette, nothing exotic:

• Titanium or lead white
• Yellow ochre
• Raw sienna
• Burnt sienna
• Cadmium red or vermilion
• A transparent red, such as transparent oxide red or alizarin crimson
• Ultramarine blue
• Ivory black
• Viridian or terre verte, optional, for cooling flesh without graying it

That covers any skin in any light. You can go further with less. The Zorn palette is four tubes, yellow ochre, ivory black, red, and white, and Anders Zorn painted a lifetime of flesh with it. Black and yellow ochre make a quiet green for cooling shadows. Black and white make a blue gray. Fewer tubes means fewer decisions and faster mixing, and for a portrait that speed is most of the battle.

Draw the head as shapes

Block the head in with a thin, brushy mix and hunt for angles, not features. Where does the shadow shape begin on the forehead. What is the tilt of the line from brow to chin. How wide is the head against its height. Get the proportion and the big shadow shape right and the likeness is already half built. Features are smaller decisions than people think, and they land easily once the scaffold is true.

Squint hard at your subject. Detail falls away. What remains is the value pattern, the map of light and dark masses. Paint that map before anything else.

Value before color

Find your two anchors early. The darkest accent, usually the pupil, the nostril, or the dark edge of the hair. The brightest highlight, usually a small note on the forehead, the nose, or the cheekbone. Place both in the first session. Now the full range is fixed, and every other value gets judged between those two poles, which stops the painting from drifting too light or too dark as you work.

Keep the shadow side as one connected mass, thin and transparent. Build the light side thicker and more opaque. Thin darks, fat lights. That one habit gives a head the feeling of light wrapping around bone, and it follows fat over lean, so the lower layers dry first and the surface does not crack on you later.

Mix flesh as temperature

Skin has no single color. What you are painting is a warm light cooling as it turns off the form, and a shadow that runs the opposite temperature of the light. Stand your sitter under a warm lamp and the lit planes go warm while the shadows go cool. Sit them by a north window and the lights cool down while the shadows warm up. Decide the temperature of your light first. Everything else answers to that decision.

Read the face in zones. The forehead tends toward yellow. The midface, nose and cheeks, runs red from the blood near the surface. The jaw and chin sit cooler, often a little green or gray, and more so on a shaved face. Mix those as separate notes instead of smearing one tone across the whole head. That variation is the difference between a living face and a mask.

When flesh goes chalky, you have added too much white. When it goes muddy, you have stirred complements into an accidental gray. Pull back to fewer pigments and let the toned ground carry some of the shadow for you. Mixing flesh, light and deep, is its own subject, taken further in how to paint skin tones in oil.

Edges carry the life

A hard edge stops the eye. A soft edge lets it travel. The turn of the cheek into shadow wants to dissolve. The lit edge of a nostril against a dark might want to stay crisp. Lose your edges along the shadow, keep them on the few features that hold the likeness, and the face starts to breathe. This is a last move, because you cannot soften an edge into a shape that is not yet correct.

If you prefer to start in black and white and bring color in over a dry monochrome layer, that works too, and it is the heart of the grisaille and underpainting method. It is slower and it teaches value cleanly. The order of thinking stays the same either way.

Work across two or three sessions

Oil gives you time, which is the reason it suits portraits. A thin umber block-in is touch dry in a day or two. Thicker flesh stays open for several days, long enough to scrape a failed cheek back to the ground and repaint it wet. Plan day one for the block-in and the value structure. Day two for color and the form. A last short pass for edges, accents, and the few sharp features, when your eye is rested and your judgment is least forgiving.

Is it hard? Yes

A convincing oil portrait asks you to draw, to read value, to think in temperature, and to handle edges, all in the same hour. That is a lot to carry at once. It gets easier the only way painting ever gets easier, through repetition that turns conscious decisions into judgment you stop having to think about. Paint the same head ten times before you chase ten different faces. The tenth sitting teaches you more than the first nine together.

The aim is not to paint a head the way I paint one. It is to build a process you can repeat until the result is yours, which is the whole point of developing your own painting style.

If you want a read on where your own work is already pointing, the Artist Reading takes a few minutes. The workshop opens in July, and the waitlist hears first.

FAQ

What is the best palette for portrait painting in oil? A limited one. The Zorn palette, yellow ochre, ivory black, red, and white, handles most skin and forces fast, confident mixing. Add ultramarine, burnt sienna, and a transparent red when you want cooler shadows and a longer reach.

How long does an oil portrait take to dry between sessions? A thin raw umber block-in is touch dry in one to two days. Thicker flesh stays workable for several days and fully cures over weeks. Paint thin to fat so the lower layers set first.

Why do my flesh tones look muddy? Usually too many pigments fighting each other, or complements stirred into gray by accident. Cut the palette, decide the temperature of your light, and keep shadows thin and transparent so the ground stays alive beneath them.

Do I need to draw well before I paint portraits? You need to see shapes, angles, and proportion, which is drawing. You do not need to render. If you can squint, find the big shadow shape, and judge a proportion, you can start, and the painting will teach you the rest.