What color is a calibrated tag?

• A. Black
• B. Blue
• C. Red
• D. White

Answer: (D)

Calibrated tags use color to show status at a glance. White on a tag means the instrument has been calibrated and is current, safe to use until its next calibration due date. It’s the color designated to indicate “calibrated.” Other colors convey different statuses—red typically signals out of calibration or needs service, while blue or black are used for other tagging categories or conditions. So the white tag is the one that communicates that the instrument has passed calibration.