Why is purple with gold taboo?

Purple is a combination of warm red and cold blue, which is an excellent stimulating color. In China tradition, purple is a noble color;

Gold symbolizes nobility, glory, luxury and brilliance. Gold can symbolize nobility, glory, luxury and brilliance, so the royal family usually makes clothes with gold. In many countries, because the color of gold is golden yellow, gold represents money, wealth and capitalism.

These two are rich colors, and the darker tones are heavier and should not be matched. For example, light purple can go with gold.