Colour sets the mood
Colour changes how a room feels long before you notice the furniture. Soft blues, greens and greys tend to feel calm, which is why they're popular in bedrooms and bathrooms. Warm whites, creams and earthy tones feel welcoming in living rooms and kitchens. Strong, saturated colours add energy and work well in smaller doses: a feature wall, a front door, a powder room. Darker colours can make a big room feel cosier, and lighter ones help a small room feel more open.
Light changes everything
A paint colour has no single look. It changes with the light that falls on it. In Canada, north-facing rooms get cooler, bluer light all day, which can make greys look cold. South-facing rooms get warm, bright light that can wash pale colours out. East-facing rooms are bright in the morning and dimmer later, and west-facing rooms are the opposite. Your bulbs matter too: warm and cool LED bulbs make the same wall look noticeably different at night.
Undertones
Most neutrals lean toward another colour. A grey can lean blue, green or purple, and a white can lean yellow, pink or blue. Undertones show up most next to other colours, like your floors, counters, trim and furniture. Holding a sample against those surfaces is the quickest way to spot one that clashes.
How much light a colour reflects
Paint makers list a light reflectance value, or LRV, for most colours, usually on the chip or the colour's web page. It runs from 0 (black) to 100 (pure white). A higher LRV bounces more light around the room, which helps in basements and dark hallways.
Sheen changes how colour looks
The same colour looks slightly different in different sheens. Glossier finishes reflect more light and can make a colour look a little lighter and richer. Flatter finishes look softer and hide bumps in the wall.
Test before you commit
- Paint large samples, or use peel-and-stick samples, rather than judging from a small chip.
- Put them on more than one wall, including the darkest corner of the room.
- Look at them in the morning, in the afternoon and at night with your lights on.
- Keep them away from the old colour's edges, which change how you see the new one.
- Live with them for a couple of days before you decide.
Flow from room to room
In open-concept homes, rooms you can see at the same time look best when their colours relate to each other. Many people keep one colour for the trim throughout the house and choose wall colours that sit comfortably side by side.
Written by Carleton Prime Painting, Ottawa. Last updated October 23, 2026.