They're called "Jeans" in French, too. Note: French pants are a singular entity. Just like a pair of pants is un pantalon, a pair of jeans is un jean. But (s)he asked for what is the french for blue jeans, so it is un jean bleu.
In WW1, trench slang used falzar, fendart, grimpant and froc; also sometimes found are Garance and Garame. A soldier is sometimes referred to as a pantalon rouge.
The green trousers are "les pantalons verts" in French.
pantalons école
Pantalon.
Culotte
le pantalon
des pantalons rouges
Green in French is vert (which is masculine) or verte (feminine)
Une chaussette is a feminine noun in French.
"loup vert" means "green wolf" in French.
The word "trousers" in French is spelled "pantalon."
Trousers = un pantalon
(les) pantalons.
Pantaloons
Freddy usually wears brown trousers.
pantalon is a French word. It means 'trousers'.
a pair of trousers
le pantalon
a traditional outfit for waiters is: black trousers, white shirt and a black (or dark green or dark red) waistcoat.
green
pantalon d'école
un pantalon noir