The bathroom is the smallest room in the house and the hardest on paint. Steam every morning, condensation on the walls, water where it lands, and not much airflow to clear it. A finish that holds up beautifully in a bedroom can grow mould in a bathroom within a season.
So the bathroom is the one room where the usual rule flips. Most walls in your home want low sheen, including your kitchen walls. Bathroom walls want semi gloss, and the reason is moisture.
Here is what to use, and the colours that make a small wet room feel calm.
The short answer
- Walls: semi gloss. It repels moisture and resists the mould that thrives on a softer finish.
- Ceiling: a moisture-resistant finish too. Bathroom ceilings catch the most steam and start the most mould. Do not default to flat ceiling paint here.
- Trim, doors, and vanity: semi gloss. The same durable finish as the walls.
- Colour: light, calm, and tested in bathroom light. Warm whites, soft greens, and blue-greys do the most work in a small space.
If your bathroom has a window and good ventilation, you have more freedom. If it is internal with only a fan, semi gloss is not optional. More on that below.
Why bathrooms are so hard on paint
Three things gang up on a bathroom wall:
- Steam and condensation. Hot showers fill the room with moisture that settles on every surface and then sits there.
- Poor airflow. Most bathrooms are small and under-ventilated, so that moisture lingers instead of clearing.
- Mould. Warm, damp, still air is exactly what mould wants. A porous finish gives it somewhere to take hold.
The finish you choose is your first line of defence. It decides whether the moisture beads up and wipes away, or soaks in and feeds a problem.
The best finish for bathroom walls: semi gloss
Semi gloss is the right finish for bathroom walls, and a bathroom is one of the few rooms where it belongs on the walls rather than only the trim.
It has a harder, denser, less porous surface than low sheen. In a bathroom, that does three things:
- It repels moisture. Water and steam bead on the surface instead of soaking in, so the wall dries rather than staying damp.
- It resists mould. With nowhere porous to settle into, mould struggles to take hold the way it would on a softer finish.
- It wipes clean. Splashes, toothpaste, and the film that builds up in a bathroom come off with a damp cloth.
The trade-off is reflectivity. Semi gloss catches the light and shows wall imperfections more than low sheen, so prep matters: fill, sand, and prime before your colour goes on. In a small bathroom, that extra light is often a bonus. It bounces around and helps the room feel larger.
Our colours come in a semi gloss finish made for exactly these surfaces. For the full logic on finishes room by room, see our guide to low sheen versus semi gloss.
What about low sheen in a bathroom?
Low sheen can work, but only in the right bathroom.
If your bathroom has a window that opens, a good exhaust fan, and genuine airflow, a quality low sheen on the walls away from the shower can hold up. It hides imperfections better and feels softer. Powder rooms are the clearest case: a toilet and a basin, no shower, no steam, so no real moisture to manage. There you can treat the walls like any other room and use low sheen.
But in a main bathroom with a shower and limited ventilation, semi gloss is the safer specification. When in doubt, go semi gloss on the walls.
Do not forget the ceiling
The ceiling is the most overlooked surface in a bathroom and the one that catches the most steam. Hot air rises, condenses on the ceiling, and that is where bathroom mould usually starts.
Skip the standard flat ceiling paint here. A moisture-resistant finish on the ceiling holds up to the steam and wipes clean if mould ever tries to start. It is a small decision that saves you repainting in two years.
The best colours for bathroom walls in Australia
A bathroom is usually small, often windowless, and full of hard, cool surfaces: tile, mirror, ceramic, chrome. The colour's job is to warm that up and make the space feel calm and a little larger.
The shades that do the most work in an Australian bathroom:
- Warm whites, which keep a small bathroom bright and clean without the cold edge of a stark white. Fresh Sheets and Blanket Fort both lift a windowless room.
- Soft greens, for a calm, spa-like feel that pairs beautifully with white tile and timber. Winter Mint is fresh and light; Sageing is warmer and more grounded.
- Blue-greys, cool and restful, the colour of still water. Lake Cloud brings a quiet, considered calm.
- Greige, when you want warmth without colour. Porcelain Bloom grounds a bathroom without going dark.
Bathroom lighting is its own challenge: often a single downlight or a bright vanity globe, sometimes no window at all. A colour shifts hard under that light. Order a peel-and-stick sample, stick it on the wall by the mirror, and look at it under the lights you actually use before you commit.
Powder rooms: where you can be bolder
A powder room has no shower, so it has no steam to manage and none of the constraints of a main bathroom. That makes it the one wet-adjacent room where you can take a risk.
This is the place for a deep, characterful colour: a moody blue, a rich green, a dramatic charcoal. A powder room is small and used briefly, so a bold wall feels like a moment rather than a commitment. Dimi's Velvet Couch or Forest Floor turn a small room into a memorable one.
What not to do when painting a bathroom
Do not use flat or matte paint on bathroom walls. It is the most absorbent finish, which is the opposite of what a wet room needs. It will hold moisture and invite mould. Save flat for dry rooms.
Do not skip ventilation. No paint can fully compensate for a bathroom that never clears its steam. Run the fan, open the window, and let the room dry out after a shower. The paint is your second line of defence; airflow is your first.
Do not paint over mould. Painting over a mould spot just hides it for a few weeks. Treat and kill the mould first, let the surface dry fully, then prime and paint.
A simple plan for your bathroom
In one line: semi gloss on the walls and ceiling, a light and calming colour tested under your bathroom lights, good ventilation, and a clean, dry, primed surface before you start.
Get the finish right and a bathroom is one of the most satisfying rooms to repaint. It is small, so it is quick, and the change is dramatic.
Start with a sample, see it in your light, and order the colour that makes the room feel calm.
Browse the bathroom range · Order a peel-and-stick sample
Frequently asked questions
What paint finish is best for bathroom walls?
Semi gloss. It repels moisture, resists mould, and wipes clean, which is why it is one of the few finishes that belongs on the walls and not just the trim. Low sheen can work in a well-ventilated bathroom or a powder room with no shower.
Can you use normal paint in a bathroom?
You can use a standard interior paint, but the finish matters more than the product. Choose semi gloss for its moisture and mould resistance, prepare the surface well, and make sure the room is ventilated.
What is the best paint to stop mould in a bathroom?
A semi gloss finish gives mould the least to hold onto, because its dense, less porous surface repels moisture. Pair it with good ventilation and treat any existing mould before you paint. No paint alone will fix a bathroom that never dries out.
What colour should I paint a small bathroom?
Light, warm tones make a small bathroom feel larger and calmer: warm whites, soft greens, and blue-greys. Test the colour under your bathroom lighting, which is often artificial and can shift a colour noticeably.
Should bathroom walls be semi gloss or satin?
In Australia, the moisture-resistant finish most brands call semi gloss is the reliable choice for bathroom walls. Satin sits a step lower in sheen and durability. For a room with a shower, semi gloss is the safer pick.
Do bathroom ceilings need special paint?
Bathroom ceilings catch the most steam and are where mould often starts, so use a moisture-resistant finish rather than standard flat ceiling paint. It holds up to the condensation and wipes clean.
