Dire tantôt blanc, tantôt noir = To say first one thing and then another.

Se manger le blanc des yeux = To have a furious quarrel.

*Rouge le soir et blanc le matin,
C’est la journée du pèlerin =
Red at night is the shepherd’s delight,
Red in the morning, the shepherd’s warning.
Evening red and morning gray
Are two sure signs of a fine day.

Blé

Manger son blé en herbe = To anticipate one’s revenue.

Bleu

J’en suis tout bleu (fam.) = Well! I am surprised.

Bloc

En bloc = In the mass, in the lump.