Shadow Colour: Studio Temperature Mistakes
Common shadow-colour habits that flatten a picture, and a calmer way to judge temperature, value and bounce light.
Shadows are where studio colour most often goes wrong. The light on an object is easy to name. The shadow is a mixture of less light, a different temperature, and some bounced colour from whatever faces it. Paint every shadow with the same blue, or the same brown, or a squeeze of black, and the picture looks assembled from a formula. The formulas are worth knowing so you can retire them.
The mistake of one shadow colour
A single tube, often sold as a convenience or mixed from black and a little blue, ignores the light you actually have. Under a warm lamp, shadows often look cooler than the lit side. Under an overcast sky or a north window, the whole scene is cooler, and the shadows may not be a separate blue at all. They may be a darker, duller version of the local colour, with a warmer note where light bounces in from a nearby wall or cloth.
Warm and Cool Colours sets out temperature as a way to build depth. In the shadow the comparison is local, not global. Look at the shadow on the object beside the shadow on the table. They are rarely the same hue. One may face the sky. One may face the wood. Paint them as relatives, not as copies of a single mix.
Black, brown and the blocked-in dark
Black darkens, and it also removes colour. A little of it, mixed into a note you have already observed, can be a tool. A shadow built from black first is a hole. Brown is the other habit, especially on skin and on wood. Not every shadow is umber. A white cup in warm light often has a grey-blue shadow with a warm rim along the bounce. Umber would turn the cup into pottery.
Mix the dark from the colours already on the palette. A complement of the local colour, added in small amounts, dulls and darkens without importing a foreign hue. That is the same discipline as Mixing Natural Greys. If you cannot name the colours in the shadow, mix two candidates and hold them up on a knife, in the same light as the object. The palette lies. The comparison does not.
Too dark, too sharp, too empty
Beginners often paint shadows several steps too dark, because the word shadow suggests night. Compare the darkest part of the shadow with the darkest small accent in the scene, a crack or a hole. The shadow is frequently lighter than that accent. If you make it blacker, the lit side will look chalky when you try to compensate.
Edges are the next fault. The shadow of a cup on a table has a sharper edge near the cup and a softer edge farther away, where the light wraps. One hard cut-out shape reads as a sticker. And shadows are not empty of colour. A bounce from a red cloth can warm the side of a grey jug that never receives the lamp directly. Miss that and the shadow looks stuck on. Catch it and the objects share a room.
A checking sequence
Name the light first, in plain words: warm lamp, cool window, mixed. Then paint one shadow as a darker local colour before you shift its temperature. Only after that value is right, push it warmer or cooler. Step back and ask whether every shadow in the picture could have been stamped from the same mix. If the answer is yes, change one of them to agree with what it faces.
A tonal rehearsal still helps. Underpainting: A Quiet Start for Stronger Oils will stop you solving a lightness problem by repainting the hue for the fourth time. Get the step of value, then let temperature be a small move, not a new drawing.
Frequently asked questions
Should outdoor shadows be blue? Sometimes the sky fills them, especially on a clear day over a pale surface. On grass, in a room, or under cloud, blue is often the wrong assumption. Look again before you reach for the same tube you used last Saturday.
How much bounced light should I add? Less than you think, once you have noticed it. A thin warm edge inside a cool shadow is usually enough. Paint the whole shadow the colour of the nearby cloth and you have replaced one formula with another.
Can I use a recipe for skin in shadow? A recipe drifts as soon as the light changes. Mix from the lit colour of that person, in that room, and shift it darker and slightly opposite in temperature. Test it beside the model, not beside a chart.