Identify the surface and follow the current instructions for your exact products. Do not sand or strip uncertain old coatings. Read the safety guide before disturbing materials.
Make a useful sample
A tiny card in a shop is a starting point, not a decision. Paint a generous sample board with the recommended number of coats and let it dry. If the sample pot uses a different finish from your final paint, remember that sheen will change the result.
Leave a neutral border or move the board away from a strong existing colour so that the old wall does not dominate your judgement. Avoid testing ten similar colours at once. A smaller shortlist makes differences easier to see.
Move it through the room
Look at the sample vertically, not flat on a table. Move it beside the floor, curtains, worktop and woodwork. Check it in the morning, afternoon and under the lamps you actually use.
St Andrews and the East Neuk can offer bright coastal daylight as well as long overcast spells. A colour should work in the ordinary light you live with, not just in the nicest ten minutes of the day.
Choose a relationship, not an isolated swatch
Walls, ceilings and trim are seen together. Compare your proposed white beside the wall colour and existing materials. Warm and cool undertones become much clearer when colours meet.
Digital visualisers are useful for exploring direction, but screens cannot reproduce paint accurately. Make the final decision with physical samples in the intended room and finish.
Common mistakes
- Choosing from a phone photograph alone.
- Testing on only the sunniest wall.
- Expecting every paint called the same colour to match across brands and finishes.
Colour changes cannot solve poor lighting, condensation or a failing surface. Deal with those causes before decorating.
Sources & further reading
Original general guidance from Aethos, informed by the resources below. These references cover relevant safety, materials or techniques, not a specification for your property. Product examples are not paid recommendations.
- Farrow & Ball: paint finishes (opens in a new tab)
Different products and sheen levels for different surfaces. Check the current product advice sheet.