White Out

Of all the Italian colors, bianco—white (which is the combination of all the colors of the visible light spectrum)—seems to be part of the most colorful Italian idiomatic expressions and terms. Some of these include:

andare in bianco: to get nowhere
Casa Bianca: the White House
far vedere bianco per nero: to mislead (deceive)
magia bianca (white magic): magic performed with the intent of doing good
mangiare in bianco: to eat only "white" food products such as bread, pasta, chicken and rice, while avoiding foods requiring frying or other difficult-to-digest preparations; typically a diet suggested for those with digestive disorders or dieting
matrimonio in bianco (white wedding): an unconsummated (and, by extension, unhappy) marriage
morti bianche / omicidi bianchi (white deaths): refers to workers who have lost their lives on the job, often as a result of an injury or fall suffered due to an unsafe work conditions
passare dal bianco al nero (to go from white to black): to change the subject
passare una notte in bianco: to have a sleepless night
prendere bianco per nero (to take white for black): to misunderstand completely
settimana bianca (white weekend): winter break at a ski resort (literally a week in the snow)
scheda bianca (white ballot): a null ballot (also referred to as a scheda nulla), often used as a sign of protest during elections