The color(s) yellow and black is/are claimed as a feature of the mark.
"PARIS", "METRO", "BUS" AND "AIRPORT TRANSPORTATION"
The color yellow appears in a quadrilateral forming the lettering "PARIS" internally to take on the color of the background; the color black appears in the wording "METRO" and "METRO - BUS - AIRPORT TRANSPORTATION" and in the stylized design of a bus and horizontal band.