What term describes the quality or state of being conspicuous?

The term that best captures the quality or state of being conspicuous is "conspicuity." This term specifically refers to the clear visibility or prominence of an object, phenomenon, or situation that makes it stand out and easily noticeable to observers. In various fields, particularly in safety and traffic control, understanding conspicuity is crucial as it pertains to how easily signs, signals, or other critical indicators can attract attention and communicate important information effectively.

While "visibility" may also imply the ability to be seen, it does not encompass the idea of standing out in a way that grabs attention as strongly as "conspicuity." Similarly, "conspicuousness" is a synonymous concept, but "conspicuity" is technically more precise and widely used in academic and professional contexts. "Highlighting" refers to the act of making something stand out, but it does not directly refer to the inherent quality or state of being conspicuous itself.