The F-16's radome has one job: to provide an aerodynamic covering of the radar assembly, and to allow the radar to "see" through it at the same time. The radome is not painted, but its neoprene coating is initially about the same color as the forward fuselage section (FS36270).
However, the coating is very sensitive to dirt and grime, and quickly darkens as a result of contaminants in the air. A radome is seldom replaced, so the color will continue to darken as it ages. During the Jet's routine repaint, the radome will remain unpainted. For this reason there is no "correct" color to represent a accurate radome. It can be any color between FS 36270 and dark grey.
That said, hope OP is now informed. to pick up on a small detail such as that.. the mind boggles..
Check six,
Pukedogg.