The word 'principled' is the adjective form of the abstract noun principle.

you can't

unprincipled

The color blue is often associated with being principled, as it conveys trustworthiness, honesty, and integrity. Blue is a calming color that represents dependability and loyalty, values often attributed to those who are principled.

Please give an example of where you acted in a principled, open and conscientiousness manner. What was the situation? What did you do? What was the outcome?