"The colors of the flag are red and white."
Translation:As cores da bandeira são vermelho e branco.
!What! "As cores" is feminine plural, so I thought the colours red and white should also be feminine plural, not masculine singular. Am I going mad? (Don't answer that.) If we paraphrase the question to "the colours of the flag are A red and A white" then I can accept they are singular, but "the colours" and "the flag" are both feminine, so as PalookaSheffield said, why use the masculine form instead of the feminine form?