Choosing paint colour for a north-facing room in Australia

Almost every article you will find about choosing paint for a north-facing room was written in the northern hemisphere, where north-facing rooms receive cool, indirect, blue-toned light. In Australia the opposite is true. A north-facing room here takes warm, direct sun for most of the day. The standard advice — use warm colours to compensate for cool light — is exactly backwards for an Australian house.

This is not a small distinction. It is the single most consequential thing to understand about choosing colour here, and it invalidates most of the guidance published by the largest paint brands in the world, because they write for their own markets.

Why the hemispheres are opposite

The sun sits in the northern half of the sky when viewed from the southern hemisphere, and in the southern half when viewed from the northern.

In London or Chicago, a north-facing window never receives direct sun. It gets soft, indirect, cool light all day — which is why northern hemisphere advice says north rooms feel cold and need warming up.

In Melbourne or Brisbane, a north-facing window receives direct sun for most of the day, all year. It is the warmest, brightest aspect in the house and the one architects design around deliberately.

The translation is straightforward: an Australian north-facing room behaves like a northern hemisphere south-facing room. Wherever you see advice for one, read it as the other.

What each aspect actually gives you in Australia

North. Direct sun for most of the day, warm in tone, and — importantly — the angle changes with the season. High overhead in summer, so eaves shade it. Low and penetrating in winter, so it reaches deep into the room. Bright, warm, and the most consistent light you have.

South. No direct sun, ever. Soft, even, indirect light with a cool cast, consistent through the day and easy to work in. This is the Australian equivalent of a northern hemisphere north room — the one that genuinely benefits from warmth in the colour.

East. Direct sun in the morning, warm and low-angled, then cool indirect light for the rest of the day. Colours read noticeably differently before and after about midday.

West. Nothing much until early afternoon, then intense, low, hot sun until sunset. The harshest light in the house and the one most likely to make a colour look completely unlike the sample.

What that means for colour

In a north-facing room, the light is doing the warming for you. Warm whites, creams and beiges tend to go yellow, sometimes markedly so. Cooler and greyer whites hold their character and read as clean rather than cold. You have more freedom here than anywhere else in the house, because the light is generous and consistent.

In a south-facing room, cool light amplifies cool undertones. A grey with a blue base can turn genuinely dreary. This is where warmth in the colour earns its place — warm whites, soft off-whites, colours with a yellow or red base.

In an east-facing room, expect a shift. Warm and inviting in the morning, cooler and flatter by afternoon. Test at both ends of the day.

In a west-facing room, afternoon sun will intensify anything warm to the point of glare. Cooler colours hold up better, and this is the aspect where external shading matters more than the paint does.

Undertones are what actually catch people out

Very few whites are simply white. Almost all carry a subtle base — yellow, red, green, blue or grey — which is invisible on a small chip and unmistakable across a whole wall.

Direct sun amplifies whatever undertone is present. A white with a yellow base in a north-facing Australian room does not read as neutral; it reads as cream. The same colour in a south-facing room may read as exactly the warm neutral you wanted.

The colour has not changed. The light has.

The practical approach is to identify the undertone before you commit — hold the sample against a sheet of plain printer paper, which is close to a true white, and the base colour becomes obvious.

Light reflectance value, plainly

LRV is a number from 0 to 100 describing how much light a colour reflects. Black is near 0, pure white near 100. Most paint manufacturers publish it.

It is useful because it predicts how a colour behaves in a given room. A low-LRV colour in a south-facing room with no direct sun will feel heavy and dark. The same colour in a north-facing room with sun streaming in can feel rich rather than gloomy.

If a room feels dark and you want it lighter, LRV tells you more than the colour name does.

The eave factor

Australian houses are frequently designed with generous eaves specifically to shade north-facing glass in summer while admitting low winter sun. That is good passive design, and it changes the light in the room substantially between seasons.

Under a deep eave, a north room in midsummer may receive very little direct sun at all, behaving much more like a south room. In midwinter the same room fills with low direct light.

So the aspect tells you a lot, but not everything. Look at what the window actually receives, at the time of year you are painting and at the opposite season.

Artificial light changes it again

Every room is lit twice — by the sun during the day and by lamps at night — and the two are rarely similar.

Warm artificial light, around 2700K, pushes colours yellow and makes warm whites creamier. Cooler light, 4000K and above, brings out grey and blue undertones and can make warm colours look muddy.

A colour chosen in daylight and lived with under warm downlights is a common source of disappointment. Test under both.

How to test properly

1. Use large samples. A postcard-sized chip tells you very little. Paint a sample board at least A3 sized, or a large patch directly on the wall.
2. Test on more than one wall. The wall opposite the window and the wall beside it receive completely different light. In one room a colour can read as two different colours.
3. Look at it morning, midday and evening, and again after dark under your actual lights.
4. Prime the sample area first if the existing colour is strong. A dark wall underneath will distort what you are looking at.
5. Hold it against your fixed elements — floor, benchtop, tiles, joinery, skirtings. Those are not changing, and colour is always relative to what surrounds it.
6. Check the undertone against plain white paper.
7. Leave it up for several days. First impressions of colour are unreliable, and the eye adjusts.

Common questions

Why did my colour look completely different at home?

Paint shops are lit with bright, neutral, consistent artificial light, which is close to nothing you have at home. A chip viewed under that light and then carried into a south-facing room in the afternoon is being seen under two entirely different conditions.

Can I use overseas colour advice at all?

The principles about undertones, LRV and testing translate perfectly. Anything referring to a specific aspect — north-facing, south-facing — needs inverting. If an article does not say which hemisphere it is written for, assume northern.

What about rooms with windows on two sides?

The dominant aspect usually wins, but the light will be more even and more forgiving, which gives you more latitude. A room with north and east glass is about as easy as Australian light gets.

Should the ceiling be the same white as the walls?

Ceilings almost always read darker than walls in the same colour, because they receive no direct light and are lit only by reflection. Many people use a slightly lighter or flatter ceiling colour for that reason. If a ceiling looks grey to you, that is the reason.

Does this apply to exterior colour too?

Yes, and more strongly, because there is no eave, curtain or lamp to moderate it. A north or west-facing wall in full Australian sun will show a colour at its most intense and will also fade fastest.

Is there a safe white?

Not universally. The white that looks clean in a north-facing room may look cold in a south-facing one, which is why the same house often uses more than one. Test per room rather than choosing once.

Where to go next

Aspect is the first thing to establish about any room and the last thing most colour advice accounts for.

Read next: winter condensation and mould, which covers the other way orientation and light shape how a room behaves through the year.

Work out which way the room faces before you look at a single colour chart, and remember that half the internet is describing a hemisphere you do not live in.