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Jyutping baak6 dai2 hak1 zi6
Pinyin bái dǐ hēi zì

Definitions (Wiktionary)
  1. noun
    black characters on a white background
    (syn.) 白地黑字
Examples (粵典–words.hk)
  1. Cantonese
    白底黑字
    白底黑字
    baak6 dai2 haak1 zi6
    • black words on a white background