The present invention relates to a decorating strip (10) for joining two coloured areas on a surface such as an interior wall of a building. The strip covers the join between the two coloured areas. The strip (10) is separated into three regions. The first region (12) abuts the first coloured area (1) and is the same colour as the first coloured area (1). The second region (16) abuts the first coloured area (2) and is the same colour as the second coloured area (2). The third region (14) has the first colour and second colour merging into one another.