Mixing muted colours for atmospheric distance

Why distance drifts towards cool and grey

Stand on any ridge in the Chilterns or the Black Mountains and look at four or five miles of landscape at once. The nearest field is alive with warm yellows and greens. Two miles away the woods have flattened into a soft blue-green. Five miles away, the hills might as well be cut from card. Nothing has actually changed except the amount of atmosphere between you and them. Every particle of moisture and dust scatters light, and the shorter blue wavelengths scatter most of all. The result is a veil of cool, pale air laid over everything distant. We call it aerial perspective, and it is the single most useful tool you have for making a flat board feel like miles of open country.

British weather is generous with us here. A damp, overcast day will show three or four clear planes of distance, especially in the west. Learn to see them and painting depth becomes far less mysterious.

Judge value before you touch colour

Squint hard at your view. The first thing you notice is not colour but tone: distant hills are usually astonishingly light, much closer in value to the sky than instinct suggests. If the sky is a pale grey-blue and the far ridge sits only a whisper darker, that is the relationship to protect. Paint the hill too dark and it will leap forward, no matter how beautifully muted the colour is.

A useful habit is to mix a patch of your intended distant tone and hold it against the sky in your sketchbook. If it reads as heavy shadow, lighten it. If ridge and sky merge completely, darken it by a fraction. Keep checking as the light changes.

Mix muted tones with complements, not with black

Distance colour is essentially a desaturated version of local colour, pushed towards blue-violet. You get there most reliably by marrying complementary hues rather than adding grey from a tube or reaching for black, which deadens everything it touches.

• Ultramarine with burnt sienna. A workhorse. Shifting the ratio warm or cool gives everything from a soft violet-grey for far ridges to a cooler grey for mist. Add a touch of white and you have distance in a single mix.
• Viridian with alizarin crimson. The classic aerial green. Tube greens are far too vivid for distant woodland; knocking viridian back with a little crimson produces the dull, slightly grey green trees actually take on at half a mile.
• Yellow ochre with a violet mix. Excellent for warm, dusty far fields in late summer, particularly on chalk downland where distance carries a biscuity haze.
• Cobalt or cerulean with a trace of raw umber. For cool, rain-washed distance — very useful in Scotland, Wales and the west country.

White alone lightens but also cools, and eventually turns chalky. If a tone goes milky, add a pinhead of the complement rather than more white. That said, chalky is often exactly what distant haze wants; the trick is knowing when to stop.

The field palette and the distance puddle

Outdoors you want to spend your time looking, not fiddling. Keep the palette short: ultramarine, cerulean, cobalt, viridian, alizarin crimson, burnt sienna, raw umber, yellow ochre and titanium white. Nine colours, and you will use five of them for the far hills.

Before starting, mix two or three muted tones in a spare corner of the palette — a light cool grey-blue and a slightly warmer grey-green. Call it your distance puddle. Having these ready stops you overworking the far shapes and keeps that passage of distance consistent as you move across the painting. Refresh them now and then as the light shifts.

Work from the back of the view forwards

Paint the sky and the furthest hills together, wet-in-wet, so the ridge softens into the cloud and the two read as related tones. Let that settle, then come forward.

• Far distance: lightest values, lowest saturation, softest edges, almost no detail.
• Middle distance: a genuine step darker and more saturated, with a little structure — a hedge line, a cluster of trees — but edges still mostly broken.
• Foreground: darkest darks, warmest colours, hardest edges, real texture and brushwork.

In watercolour, let the distant wash dry completely before laying the mid-distance over it; bleeding between planes destroys the separation you have worked for. In oils or acrylics, thin the distance and thicken the foreground, which reinforces the illusion with texture alone.

Common traps and quick checks

Almost everyone over-saturates the middle distance at some point. It happens because our memory of "green field" is far more vivid than the muted thing in front of us. When in doubt, take the colour down a notch and compare it with the sky again.

• Warm distance still needs muting. A sunset ridge may glow pink or orange, but it should still be less saturated than anything in the foreground.
• Don't lose the value step entirely. Too much muting and the picture reads as one flat grey field. Distance is subtle, not absent.
• Vary the haze across the view. Real air is not uniform; distance may be paler where a valley opens and slightly stronger where a massing wood holds darkness.
• Check your darks. If your furthest hill is darker than your mid-distance, something has gone wrong.

Get into the habit of asking one question every time you step back: does this shape read as further away than the one in front of it? If not, lighten it, cool it, soften its edges. Repeat until the miles open up.