The green on the flag symbolizes the vast forests, and the yellow rhombus represents the abundance of gold and resources. The blue circle in the center signifies Brazil's beautiful sky.

The blue circle in the center isn't just the sky. It's a depiction of the night sky over Rio de Janeiro on the day Brazil became a republic in 1889. Each star symbolizes the capital and the states, and the motto 'Ordem e Progresso' (Order and Progress) is an important message showing the nation's direction for development.