There is a wooden sign with yellow lettering that reads "Profile Parking."
The rear plates in the older series of number plates were yellow and black lettering.
Until 1948 the cars had a black roof, dark Pullman-green body with yellow lettering, and black trucks.
B. locomotives was green with yellow lettering and a black chassis.
The name Vault 51 and the bright yellow lettering used on the numbers are a subtle reference to the video game Fallout.
Larger vehicles, and some minibuses, are painted green with yellow lettering.
CS6 changed it a bit to a brown square with a yellow border and yellow lettering.
Red banners with yellow lettering, exemplified on the crests of Vietnam and China.
Before 1997, the MetroCard design was blue with yellow lettering.
The yellow lettering remained, highlighted with Malachite green.