No, you do not have to. If you want only the door leaves to contrast, for example against a light interior, you can have white-painted frames for interior doors. It is quite common to let the frame “melt into” the wall.
Made in Bovallstrand - Sweden
Bovalls Dörrbyggeri builds wooden front doors, wooden internal doors and wooden windows in certified materials with a passion for wood. Wood as a unique natural and living material and hope for a sustainable production for both people and the environment. Simply, Wood, hope and love!