Meaning of the word "a black plum is just as sweet as a white one" in English

What does "a black plum is just as sweet as a white one" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

a black plum is just as sweet as a white one

US /ə blæk plʌm ɪz dʒʌst æz swiːt æz ə waɪt wʌn/
UK /ə blæk plʌm ɪz dʒʌst æz swiːt æz ə waɪt wʌn/
"a black plum is just as sweet as a white one" picture

Idiom

a proverb suggesting that external appearance does not determine a person's worth or character

Example:
You shouldn't judge him by his background; remember, a black plum is just as sweet as a white one.
People often overlook talent in unlikely places, but a black plum is just as sweet as a white one.