The Undercover Colors meme is based on a real-life invention by students at North Carolina State University: a nail polish designed to change color when dipped into a drink containing date-rape drugs. While the product was created as a serious tool for personal safety and empowerment, it gained significant traction on social media as a symbol of vigilance. In meme culture, the image is often used to represent 'testing' the atmosphere of a situation or identifying untrustworthy behavior. It oscillates between being a powerful PSA tool for campus safety and a humorous way to signal that something—or someone—seems inherently suspicious or 'sus' in a social setting.