The sentence states a comparison between the colour of the pendant and the dress. The phrases in comparison should be parallel to each other in structure and form. The underlined phrase has omitted the main noun 'colour', on the basis of which the comparison is made. Hence option D is incorrect. Option B is correct because it is parallel in structure and context to the first phrase "colour of the pendant". Option A is incorrect because the noun is repeated and there can't be a comparison between the colour of the pendant and the pendant itself. Option C is incorrect because it's not mentioned that 'the colour of the pendant" is unoriginal, so the phrase is irrelevant to the context of the sentence.