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
Ludovicus	-	Ancient Germanic (Latinized)
Trinidad	tree-nee-DHAHD	Spanish
Anstie	['ænsti]
Germana	-	Italian, Ancient Roman
Joanna	jo-AN-ə (English), yaw-AHN-nah (Polish)	English, Polish, Biblical
Lovrenc	-	Slovene