Name the Dulux colour in a photo or on a wall
Open the Identify tab and hold the crosshair 15 to 30 cm (6 to 12 inches) from the surface, or choose a saved picture in the Photos tab and drag the eyedropper onto the colour. Tap the source on the result card, pick Dulux for the UK range or Dulux Australia, and the app ranks that range's closest colours by match percentage.
The percentages come from CIEDE2000, a standard colour difference formula, but a photo is only as true as the light it was taken in. Interior shots on Pinterest and Instagram are often warmed up or brightened, so sample a few spots on the same wall and treat the result as a shortlist to check against a tester pot.