The mark consists of Group of three "Chevrons", angular marks associated with military rank along with a circular chevron at the bottom called a "rocker" in military jargon, denotes a Senior Non-Commissioned Officer (SNCO), military services referring to this rank informally as "Sarge"; but here the "rocker" is turned upside-down hence the visual reference to the Grumpy in the trademark - which with the visual elements and term Grumpy Sarge is clearly distinctive as to the trademark owner who is a retired SNCO..
Color is not claimed as a feature of the mark.