The quote reflects a moment of judgment or surprise regarding someone's attire, highlighting how clothing can influence perceptions. It suggests a character's internal dialogue, possibly poking fun at an individual's fashion choices—comparing them humorously to a traffic light, which has distinct and bold colors that draw attention. This illustrates the character's critical or whimsical attitude toward others.

In "The Hidden Oracle" by Rick Riordan, the use of such imagery not only adds humor but also serves to develop the narrative by providing insights into the characters' interactions and societal norms. The playful nature of the remark can also indicate deeper themes related to identity and self-expression, as the characters navigate their world while grappling with external judgments.