The term "911 white" functions grammatically as either a proper noun or a proper adjective. As a proper noun, it serves as the specific name of a distinct color, similar to "Tiffany Blue" or "Ferrari Red." As a proper adjective, it modifies a noun to describe it as being of that specific color, such as in the phrase "a 911 white finish."
The grammatical classification depends on its use within a sentence, which in turn defines the focus of the subject matter. When treated as a proper noun, the term itself becomes the subject of analysis. For example, in the sentence, "911 White has a unique formulation," the keyword is the central topic. An article framed this way would explore the color's history, chemical composition, or its significance within the Porsche brand. Conversely, when used as a proper adjective, the term provides a specific attribute to another noun. In "The vehicle features a 911 white interior," the focus is on the interior, with the color being a descriptive detail.
Determining the primary function is crucial for establishing the article's main point. If the article's thesis is about the color itselfits legacy, market value, or cultural impactthen defining the keyword as a proper noun is the most accurate approach. If the article's purpose is to discuss objects, applications, or trends that are characterized by this color, its role as a proper adjective should be emphasized. This distinction clarifies whether the core subject is the color or the object the color describes.
