How to Test Paint Colours with Samples at Home
A practical way to test paint samples on your walls, check them in different light, and choose a colour with confidence before you buy or brief a decorator.
A colour that looks perfect on a screen or a small card can look quite different once it covers a whole wall. Light, adjacent colours, flooring and furniture all change how it reads. Testing samples in your own room is the most reliable way to avoid expensive disappointments.
Why testing matters
- Light changes everything. North-facing rooms tend to cool colours down, while south-facing rooms warm them up.
- Artificial light varies. Warm bulbs make colours look yellow; cool white bulbs make them look bluer.
- Neighbouring colours influence perception. A cream looks different next to a cool grey.
- Finish alters appearance. The same colour in matt and silk can look different. See matt vs silk vs eggshell.
Start with a short list
Choose two to four colours at most. Too many options make it hard to compare. Think about:
- The mood you want (calm, bright, cosy, dramatic)
- The colours of floors, furniture and fabrics that will not change
- The room's light, and how it is used at different times of day
How to test
Use large samples
Paint a sample board or lining paper, ideally about A2 in size, with two coats. Alternatively, paint a large patch of at least 50 cm square directly on the wall. Small swatches are unreliable.
Use a base coat
If the wall is dark or patterned, paint a patch of white first so the sample is not distorted by the colour underneath.
Move them around
Sample boards can be taped on different walls and moved. Directly painted patches are fixed, so choose representative walls such as one near the window and one far from it.
Look at different times
Check each sample:
- Morning, midday and evening
- On sunny and overcast days
- With lights on at night
Look at them from different positions and from across the room, not just close up.
Compare with fixed elements
Place samples next to your floor, curtains, sofa and woodwork colour. A white that seems fine alone can look yellow next to a bright white skirting board.
Common colour traps
- Choosing a pale grey that turns blue in a north-facing room.
- Warm whites that look pink or yellow under certain lights.
- Dark colours that look flat in a poorly lit room.
- Overly bright colours that feel stronger once they fill the walls.
If your room has little light, see colour schemes for small rooms for ideas about working with it rather than fighting it.
Sample pots versus testers
Tester pots are small and inexpensive, and are meant for exactly this purpose. Colour matched testers may vary slightly from full tins, so if you are mixing a custom shade, keep the colour code. Ask whether the final tin will be tinted to the same formula.
Decide before the decorator arrives
Changing colours after work starts is costly and slows the job. Decide on the colour, finish and which surfaces get which shade before the first day. Send the colour names or codes in your brief. See how to brief a decorator.
If you are unsure
A decorator who has worked on similar homes can often suggest what works in a given light. In a Compito request, you can mention colours you are considering and ask providers for their view, then discuss by message before you accept an offer.
A step-by-step sampling plan
- Narrow your choices. Pick two to four colours from a chart or online and buy one tester of each.
- Prepare boards. Cut four pieces of lining paper or card at least A2 size, one per colour.
- Paint two coats. Let the first coat dry fully before the second, because wet paint looks darker.
- Add a white border. Leaving a white margin helps your eye judge the colour.
- Place boards at eye level. Fix them with low-tack tape on walls in different parts of the room.
- Review over several days. Check morning, afternoon, evening and at night with your usual lights.
- Eliminate one at a time. Remove the weakest option each day until one remains.
Reading undertones
Many whites and neutrals have undertones, such as green, pink, yellow or blue. These show most clearly against pure white card or next to other colours. Place samples next to a sheet of white paper and look for a hint of tint, then check whether that tint suits the flooring, curtains and furniture. A cream with a yellow undertone may look cheerful with oak floors, yet look dull beside cool grey carpet.
Special situations
Rented homes and temporary colours
If you may need to repaint back, keep the colours simple and note exactly what was there before. Neutral choices are easier to match later.
Open-plan spaces
Test samples in each zone, since light and views change across the space. Look at transitions between colours on adjoining walls.
Dark rooms
Dark colours can feel cosy in a dimly lit room, but they absorb light. Test with the lighting you will actually use at night.
Ceilings and woodwork
Whites are rarely the same, so test them side by side. A slightly warmer ceiling can sit more softly with a coloured wall than a stark bright white.
Before ordering the full amount
Check the colour name, code and finish on the tin, and note them down. Use how many litres of paint you need to work out quantity. Buy a little extra for touch-ups, and keep the testers for later.
Frequently asked questions
How big should a paint sample be?
At least about 50 cm by 50 cm, applied in two coats. Bigger gives a more accurate impression.
Can I trust colour matching on my phone?
Screens are a rough guide only. Always check a physical sample in the room.
How long should I live with samples before deciding?
Ideally a few days, so you see them in different weather and light conditions.
Do tester pots dry the same as the final colour?
Roughly, though testers may be a slightly different finish or formulation. Treat them as a guide and check the final colour on a patch of wall once the first coat of your chosen paint is dry.