true to (one's) colors

Unfailingly loyal. Don't worry, the enemy will not be able to sway Richard—he is true to his colors.

Name	Pronounced	Usage
Corey	['kəʊri]
Maryana	-	Russian
Reynaud	re-NO	French
Frieda	FREE-dah (German), FREE-də (English)	German, English
Tijana	-	Serbian, Croatian
Cunningham	['kʌniəm]