The color(s) dark blue, light blue, gray, and white is/are claimed as a feature of the mark.
"CLEAN"
The mark consists of a gray airplane facing forward, which is also above the words "SAFETY 1ST NATA" with "SAFETY 1ST" in dark blue and "NATA" in light blue directly below the "ST", below all of this is the word "CLEAN" in light blue. This is all on a white background except in the center is a white engine fan with gray highlights.
SAFETY FIRST CLEAN NATIONAL AIR TRANSPORTATION ASSOCIATION