blanc
white wine
In wine terminology, refers to a white wine. Often used in the phrase 'Vin blanc'.
Zu Fisch passt am besten ein trockener Wein, am besten ein Blanc.
A dry wine goes best with fish, preferably a blanc.

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white wine
In wine terminology, refers to a white wine. Often used in the phrase 'Vin blanc'.
Zu Fisch passt am besten ein trockener Wein, am besten ein Blanc.
A dry wine goes best with fish, preferably a blanc.

'Blanc' is a loanword from French and means 'white'. In German, however, it is not used generally for the color white, but only in special contexts such as wine or card games.
Für eine weiße Wand würde man nie „eine blance Wand“ sagen.
For a white wall, you would never say 'eine blance Wand' (a blanc wall).
The adjective 'blanc' is invariable in German. It is never declined and does not take endings, even when it comes before a noun.
Er bestellte ein Glas „Vin blanc“.
He ordered a glass of 'Vin blanc'.
You can easily recognize the meaning from the context. If people are talking about food and drink, it means white wine. If people are talking about card games, it means that someone does not have a suit.
Zum Fisch passt dieser Blanc hervorragend.
This blanc goes excellently with the fish.
In the context of card games like Skat, 'blanc' always comes after the suit that you do not have. The typical construction is '[suit] blanc sein' (to be void in [suit]).
Er hatte ein gutes Blatt, war aber leider Herz blanc.
He had a good hand, but unfortunately he was void in hearts.
free
'frei' and 'blanc' can both express that something specific is not present. 'frei von' is used generally, for example with foods, rooms, or burdens. 'blanc', on the other hand, is a special word from card games such as Skat and means that you have no cards of a particular suit in your hand. The words can be confused because both express a kind of 'without'. In everyday language, however, you almost always say 'frei von'. 'blanc' only fits in this special card-game context; the meaning for white wine has nothing to do with 'frei'.

Beim Skat ist Luis in Herz blanc und spielt deshalb sehr vorsichtig.
In Skat, Luis is void in hearts, so he plays very carefully.
Der Kuchen ist frei von Nüssen, deshalb kann Ali ihn essen.
The cake is free of nuts, so Ali can eat it.