Colman was born in the village of Tebicuarymí, a town close to Caballero, Paraguarí Department, Paraguay.
His father died when he was very young and since then he had to perform various activities to make sustainable life for his family, whose head was his mother.
Andres Cuenca Saldivar, their duet, recalls the following in a letter contained in the files of Authors Paraguayans Partners (APA): "When I came to Buenos Aires with the harpist Pedro Gamarra, I met Ramon Vargas Colman, with him, then, an official at the port of Asunción, in 1958, we recorded the first album, our first success was the song Vapor Cue, and our work recording took place at all times and on a regular basis.
This theme was recorded in 1958 for the label "Columbia" Argentina, with the special participation in the interpretation of Harp, another enshrined in this instrument the artist Lorenzo Leguizamón.
In 1979, Paraguayan residents in the United States organized a Historical and multitudinous presentation according to a letter preserved in APA.