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
Felizitas	fe-LEE-tsee-tahs	German
Hye	hye	Korean
Almond	['a:mənd]
Ryder	RIE-dər	English (Modern)
Tzeitel	-	Yiddish
Mac Beatha	-	Medieval Scottish