Meanings of blue pantaloons in English

A bare-footed unshaven man in dark blue pantaloons and cotton shirt presented himself.

He wore a black coat and waistcoat, blue pantaloons, Hessian boots, and a hat 'in the extreme of the newest fashion.'

I would rush into the first doorway and run up stairs, pull off my beard, blouse, and blue pantaloons, and then walk quietly down.

The individual addressed as Dick was certainly a dude of the fifteenth degree-his pale-bluepantaloons being sufficient proof without venturing another glance.

"Then where did you get them blue pantaloons?"