Strong Contrast Is Required
Use light lettering on dark paint and dark lettering on light paint. Avoid combinations with similar brightness or value.
High-contrast lettering guide
USDOT Number Color Requirements
Federal USDOT markings must contrast sharply with the background. Choose vinyl based on the vehicle color and surrounding graphics.
Reviewed against official federal guidance
Practical USDOT Compliance Guidance
Account for Wraps and Stripes
Busy graphics can reduce readability. Use an open area or a solid background panel when the vehicle has multicolor graphics.
Review in Daylight
Test the planned color on the actual vehicle outdoors and check recognition from multiple angles and roughly 50 feet away.
Related compliance resources
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