Complex sentence: In 1300 BC, the color of the nail polish symbolized the ranking of social class each individual earned: gold and silver were considered to be the royal colors; however, were later changed to black and red.
Split into simpler sentences: In 1300 BC, the color of the nail polish symbolized the ranking of social class each individual earned. The colors gold and silver were considered to be the royal colors; however, were later changed to black and red.