白地黑字

báidìhēizì
  1. (uncommon) black characters on a white background
  2. black characters on a white background

Wiktionary

Entry Composition

1 白地 báidì
  1. vacant land; open space; glade; unsown field
  2. wasteland; undeveloped land; uncultivated land; barren land
  3. white base
2 黑字 hēizì surplus; in the black