Translation of "Candor" in Spanish

Some people call it radical candor

Algunos lo llaman "franqueza radical",

I still remember staring with fear at his face marked with candor and toughness.

Aún me recuerdo mirando con miedo su rostro surcado a la vez de candor y dureza.

“Whether about issues on which we agreed or disagreed, the spirit of candor and openness

"Sea sobre temas en los que estamos de acuerdo o no, el espíritu de franqueza y apertura,