The colors (red, white, and blue) refer to the French Tricolor, symbolizing the ideals of the French Revolution: liberté, égalité, fraternité.

The coat of arms symbolizes the first city of Porto Calvo.

The three shells represent the three historic villages of the state, present-day Porto Calvo, Marechal Deodoro, and Penedo.

The green bouquets in the center of the flag depict sugarcane and cotton.

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