black-and-white (displaying images in shades of grey/gray)

champagne made exclusively from white grapes, especially from Pinot Blanc/Chardonnay grapes

champagne made exclusively from black grapes, especially from Pinot Noir grapes

bleed white (cause hardship by cutting supplies off)

in black and white, explicitly

plural of chèque en blanc

blank check (a signed cheque with the value left blank)

electronic white board

very bluntly, point-blank, directly, all of a sudden, suddenly

(figuratively) to begin with the easiest part; to enjoy something while it lasts; to have it easy