What color is the lettering on a probationary driver's license?

The lettering on a probationary driver's license is red, which is designed to indicate the restricted nature of the license compared to a full, unrestricted driver's license. This use of color is a purposeful decision to convey important information about the status of the driver's licensing. The red lettering serves as a visual cue to law enforcement and others that the driver is still under certain conditions or limitations, making it clear that they are in a probationary period and still developing their skills and responsibilities as a licensed driver.