The useful test of a paint colour is how it appears in your room, not how it looks on a phone screen. Keep the shortlist small and observe the samples in the light you actually use. A colour that works beside a window may read differently in a darker corner.
Move the sample around the room
Dulux recommends trying colours in different positions and checking them under changing daylight and artificial light. Its movable-paper suggestion lets you compare walls without creating a patchwork of permanent test areas. Make a simple note of which sample you prefer in each position. That is more useful than repeatedly comparing names on a colour card, because it records the conditions in which the finished room will be seen.
dulux.co.uk · Dulux · Light and wall colours
Understand what a sample demonstrates
Benjamin Moore’s guidance distinguishes colour sampling from the final coating: samples help judge appearance, while the selected product and finish still matter. A movable board is a comparison tool, not a promise that every finish will look identical. Once the colour is chosen, check the actual paint specification for the surface you intend to decorate. Both manufacturers sell paint; this edit draws on their sampling methods without ranking their products or claiming firsthand testing.
