"[a]n application for a Community Registered Design may be filed in black and white (monochrome) or in colour. If colour forms no part of the design then it is conventional to file the design in black and white. Similarly, if a particular colour does form part of an aspect of a design then it may be filed wholly or partly in that colour. So also, if monochrome colours are a feature of the design, this can be shown by placing the design against a background of a uniform but different colour."