How to Build a Gouache Painting from Midtones Instead of Starting with Shadows

Value means how light or dark a color appears. A midtone sits between the lightest and darkest parts of your subject. It does not have to be an exact halfway gray, and different objects can have different middle values.

In this method, you first paint broad shapes that represent the subject’s main colors at moderate values. You then divide those shapes into lighter and darker areas. Think of the first ochre shape as the box’s color foundation: the light on its top and the shadow on its side come afterward.

Gouache’s covering ability makes this sequence possible. Canson describes both wet-on-dry layering and the ability to lighten a painted color with white. Its basic guide recommends starting dark, so the workflow here is an alternative exercise built around those material properties, rather than a universal painting rule. Canson: Gouache—Basic concepts

Starting in the middle gives you a reference for decisions in both directions. Once the box and tabletop are visible together, you can judge whether the box needs a darker side, a lighter top, or a different background before committing to the strongest contrasts.

For this exercise, use a small sheet of watercolor paper, a medium flat brush, a smaller round brush, a mixing palette, water, and scrap paper. A sheet around 5 × 7 inches keeps the large shapes manageable. Choose a plain box with clearly visible top, front, and side planes, and place it where one consistent light source makes those planes distinguishable.

A practical palette is yellow ochre, ultramarine blue, burnt sienna, and white. These are suggested exercise colors; use comparable colors you already have. You need an ochre mixture for the box, a blue mixture for the tabletop, and enough mixing space to keep their light and dark variations separate.

Choose traditional gouache for the full workflow, including its correction steps. Acrylic gouache behaves differently after drying: Holbein describes its Acrylic Gouache as water-resistant once dry. The value-building sequence can still be used with it, but you should not expect to soften dried paint by rewetting it. Holbein: Gouache

Mix enough of each main color to cover its whole shape, and keep some untouched on the palette for corrections. Canson recommends planning mixture quantities and having extra paper available for tests. Those preparations are particularly useful when you need to restore a midtone later. Canson: Gouache—Preparing and maintaining your materials

Before painting, make a small value plan. For this exercise, use five steps: 1 is the lightest and 5 is the darkest. The assignments below are illustrative, not measurements of every ochre box. Change them if your actual setup looks different.

Area	Illustrative final value	Painting decision
Background	2	Establish a pale surrounding shape
Blue tabletop	3	Block in a middle-value blue
Box front	3	Use this as the box’s starting midtone
Box top	2	Add a lighter mixture after the block-in
Box side and broad cast shadow	4	Add darker shapes over the foundation
Small contact accent beneath the box	5	Reserve for the finishing stage

Mix the box’s starting color from ochre, adjusting it with white or a little darker color as needed. Make a separate middle-value blue for the tabletop. The two mixtures can have similar values while remaining distinct in hue.

Paint a swatch of each and let it dry before judging. Etchr’s introduction explains that traditional gouache can shift in value as it dries, with light mixtures drying darker and dark mixtures drying lighter. A dry swatch is therefore a more useful reference than a wet puddle on the palette. Etchr Lab: Introduction to Gouache

Compare the dried swatches with your value plan. Leave enough room to make a clearly lighter and a clearly darker version of each main mixture. If your starting ochre is already close to the brightest part of the box, darken the foundation mixture before proceeding.

Lightly draw the box’s outer silhouette, its three main planes, the tabletop boundary, and the cast shadow’s outline. Keep the drawing simple enough that you can cover or adjust it.

Paint the pale background, then the blue tabletop. Fill the box’s entire silhouette with its ochre midtone, including the areas that will later become lighter or darker. For now, leave the cast shadow as tabletop color. You have placed its boundary in the drawing without using it as the painting’s foundation.

Aim for a smooth, relatively thin application that flows from the brush without forming puddles or raised ridges. Adjust on scrap paper: if the stroke breaks unintentionally, add a little water; if it spreads beyond the intended edge, blot the brush and mix in more paint.

Opacity varies between colors, so a weak-looking passage is not automatically a water-control problem. Winsor & Newton’s Designers Gouache chart lists individual opacity ratings, including differences within its yellow range. Check your own paint’s information and test its coverage before repeatedly repainting a transparent-looking patch. Winsor & Newton: Designers Gouache

Let the block-in dry. At this checkpoint, assess the silhouette, placement, and relationship between the blue and ochre. Correct a box that is too wide or a background that is too dark now, while the painting still consists of a few simple shapes.

Set aside part of the original ochre mixture. In another mixing area, make a darker variation for the box’s side. Try adding a small amount of burnt sienna and ultramarine, then adjust against the observed subject. There is no fixed mixing ratio: your target is a distinct darker plane that still belongs to the box’s color family.

Paint the side as one connected shape. Keep the front midtone visible. Then mix a darker tabletop color and paint the broad cast shadow according to its observed outline. Treat the shadow on the tabletop separately from the shadowed side of the box; they fall on different colored surfaces.

Use a loaded brush with controlled moisture and make as few passes as practical. Traditional gouache can reactivate under a wet brush, and repeated brushing can pull the underlying color into the new layer. Etchr recommends building more substantial paint over thinner layers and avoiding repeated passes when you want clean separation. Etchr Lab: Introduction to Gouache

If the darker stroke begins picking up ochre, stop and let the area dry. Clean the brush, remix the intended shadow color, and test a less watery stroke on your scrap block-in. Continuing to work the same damp patch makes it harder to tell whether the problem is your mixture or the disturbed foundation.

Make a lighter box mixture in a clean palette area by adding white to some reserved ochre. Paint the top plane, keeping its boundary aligned with the drawing. Leave the front largely untouched so that the original midtone remains a visible part of the finished object.

For an opaque light plane, use a lighter mixture rather than simply flooding the original color with water. Canson distinguishes adding white to create a lighter mixture from dilution, which reduces opacity. Canson: Gouache—Basic concepts

Check the dried top against the front and side. If all three planes are distinct, you may need very little additional modeling. A plain matte box might have no bright highlight at all. Add a narrow light edge or small bright mark only where you can actually see one.

Keep the light paint brushable rather than piled up. Winsor & Newton identifies insufficient dilution and binder absorption between layers as possible causes of cracking in its Designers Gouache. Strong coverage should come from an appropriate mixture and application, with enough water for the paint to flow. Winsor & Newton: Why does cracking occur in Gouache painting?

Let the painting dry before diagnosing it. Then compare one relationship at a time. The following sequence is a decision aid for this exercise, derived from its value plan and the layering behavior described above.

What you see	What to check	Next adjustment
The box looks flat	Are top, front, and side actually different values?	Adjust one entire plane instead of adding small details
The box blends into the tabletop	Are adjacent shapes too similar in value?	Change one neighboring shape while preserving the box silhouette
A light stroke looks dirty	Did the brush pick up the underlayer?	Let it dry, clean the brush, and test a controlled opaque stroke
The painting looks uniformly pale	Has white been added to nearly every mixture?	Reintroduce a stronger middle color in a selected area
The surface is becoming ridged	Are corrections accumulating as thick paint?	Stop adding layers and simplify the passage

For a misplaced edge, repaint the neighboring shape with its reserved mixture, then restore the correct box edge after drying. For a whole plane with the wrong value, replace the plane as one shape. Canson specifically suggests repainting an unsuccessful color block rather than continually adding shading and light, and cautions against excessive thick layers. Canson: Gouache—Basic concepts

Check whether the box reads clearly through its silhouette and three planes. Look for a visible area of the original front midtone, a lighter top, and a darker side. Make sure the cast shadow belongs to the tabletop and follows the observed shape.

Add the deepest contact accent beneath the box only if the subject calls for it. Then inspect edges: keep the clear plane changes crisp, and soften only the transitions that appear soft in the setup. Avoid outlining every boundary with your darkest mixture.

The finished painting should retain a clear role for its first layer. Its middle values establish the main color shapes, its darker passages describe the shadowed areas, and its lighter passages describe the illuminated planes. Once those relationships explain the subject, leave the remaining midtones visible and put down the brush.

• Gouache: Basic concepts — Canson
• Gouache: Preparing and maintaining your materials — Canson
• Designers Gouache — Winsor & Newton
• Why does cracking occur in Gouache painting? — Winsor & Newton
• Gouache — Holbein Artist Materials
• Introduction to Gouache — Etchr Lab