Colour in painting
Colour intimidates, but it becomes much simpler once you break it down into three dimensions: hue, value and saturation. Most colour mistakes — those paintings that look «garish», «plastic» or «muddy» — come from poor saturation control or from confusing hue and value. Mastering this vocabulary means you stop mixing at random.
The three dimensions of colour
Hue is the name of the colour: red, blue, green, orange. It's what we spontaneously think of when we say «colour». Value is how light or dark that colour is — the same red can be light (pink) or dark (burgundy). Saturation (or chroma) measures the intensity, the purity of the colour: a highly saturated colour is vivid, brilliant; a low-saturation colour is greyed, muted, close to neutral.
These three dimensions are independent: you can change one without touching the others. Beginners mostly confuse value and saturation, believing they «lighten» by adding white when they are also desaturating, or thinking they «intensify» when they are merely darkening. Knowing which of the three dimensions you are talking about is the colourist's first skill.
Controlling saturation
Saturation is the most mishandled dimension. In nature, very few colours are truly saturated: most of what we see is made of coloured greys, broken tones, subtle nuances. The beginner, by contrast, squeezes pure colour from the tube and gets paintings that look artificial, plastic. The golden rule: pure, saturated colour is a spice, not a meal. Used sparingly, it sings; used everywhere, it saturates the eye and loses all impact.
To desaturate a colour without dirtying it, add a little of its complementary (green for red, orange for blue) rather than black or grey. This method keeps the colour alive while lowering its intensity. Then reserve your most saturated colours for your centre of interest: by contrast with the surrounding broken tones, they will naturally draw the eye.
Colour temperature
Colours are grouped into warm (reds, oranges, yellows) and cool (blues, greens, violets), but temperature is mostly relative: a red can be «cool» next to a more orange red. The most useful principle in painting is the temperature contrast between light and shadow. If the light is warm (sunlight), shadows tend cool; if the light is cool (overcast, north light), shadows warm up. This warm/cool play gives volume and vibration to a surface.
Exploiting temperature lets you suggest light without forcing the values. A cheek turned toward the light can simply grow warmer, an area that recedes can cool slightly. These subtle shifts make all the difference between a «dead», uniform colour and a colour that breathes.
Harmony through a limited palette
Colour harmony does not come from a large number of tubes but, on the contrary, from a limited palette. Three to five well-chosen colours are enough for most subjects, and mixing every hue from those same bases creates a natural unity: the colours «resemble each other» because they share pigments. A classic starter palette — one red, one yellow, one blue and white — pushes you to mix rather than reach for the ready-made tube.
Finally, a common mistake: copying the exact colours from the photo, pixel by pixel. Cameras distort colours, crush shadows and saturate highlights. It's better to follow the relationships — this area is warmer than that one, darker than that other — than the absolute values. Painting the relationships rather than isolated colours is the secret of a coherent whole.
The colour wheel and complementaries
The colour wheel arranges hues in a ring: the primaries (red, yellow, blue), the secondaries obtained by mixing them (orange, green, violet), and the intermediates. Two colours opposite each other on the wheel are called complementary: red and green, blue and orange, yellow and violet. This pair has two valuable properties. Side by side, two complementaries reinforce each other and vibrate — the most intense contrast there is. Mixed together, they neutralise each other and produce coloured greys.
Understanding complementaries unlocks a huge number of situations. A sky too blue? A touch of orange calms it. A shadow too garish? A hint of its complementary tames it. A centre of interest lacking punch? Placing its complementary right beside it makes it pop. Rather than piling up tubes, learn to navigate this wheel: it is a map that explains why colours agree or fight.
Coloured greys and broken tones
Beginners fear grey, associating it with sadness and «dirt». The experienced painter knows that coloured greys — neutrals that lean slightly toward a hue — are the raw material of almost every painting. The vast majority of an image is made of these broken tones, neither fully grey nor saturated: a «grey» that leans green, a beige that leans pink. It is they that, by contrast, let the rare bright colours sing.
To make lively coloured greys, avoid killing your mixes with black: instead mix two complementaries with one dosed more than the other, or grey a colour with a little of its neighbour. A grey made this way keeps a temperature and an identity — it «leans» somewhere — rather than being a neutral, dead grey. A painting made entirely of subtle coloured greys, punctuated by two or three saturated accents, is almost always truer than one saturated everywhere.
Building a starter palette
Rather than piling up dozens of tubes, most painters recommend starting with a limited but well-thought-out palette. A solid base: a white, plus two versions of each primary — a warm and a cool. For example a warm yellow and a cool yellow, a warm red and a cool red, a warm blue and a cool blue. This «split primary» set lets you mix both bright secondaries (by pairing primaries that lean toward each other) and muted secondaries (by pairing those that oppose).
With these six colours plus white, you cover the vast majority of subjects while keeping the unity that comes from a restricted palette. Adding an earth colour (such as a raw sienna) and possibly a black can help, but these are options, not necessities. What matters is not the number of tubes but your intimate knowledge of how they mix: better to master six colours than be overwhelmed by twenty.
Practical tips
- → Desaturate by adding a little of the complementary rather than black: the colour stays alive.
- → Reserve your most saturated colours for your centre of interest; grey down the rest.
- → Always separate the three questions: which hue? which value? which saturation?
Related guides
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