For those of us unfamiliar with the meaning of colors on plate numbers, PLEASE PAY ATTENTION

The plate number that is lettered in BLUE indicates a private owned vehicle.

While the RED lettered plate number indicates a vehicle used for commercial purpose.

Then the GREEN lettered plate number shows that the vehicle is government owned and is used by government officials.

Lastly, the BLACK lettered plate numbers are for members of the Armed Forces, that is, the Military/Paramilitary etc

So from the colour of a vehicle's plate number, you can easily tell the purpose of the vehicle.