In Jodi Picoult's "Nineteen Minutes," the character Lacy experiences a moment of realization regarding chameleons. She reflects on her lack of understanding about the true color of a chameleon before it adapts to its surroundings. This insight symbolizes how people often overlook the true nature of others, only recognizing their traits when external circumstances prompt change.

Lacy’s contemplation highlights themes of perception and identity, suggesting that individuals can be complex and multifaceted, much like a chameleon. It encourages readers to consider the deeper qualities of people rather than making superficial judgments based on outward appearances.