Vates Cosmicus Flag from the Fifth Element.

Civilization of Vates Cosmicus Flag from the Fifth Element film / Props from The Fifth Element for 3d printing.

I've named the Plava Laguna civilization - Vates cosmicus.
Azure (blue): a symbol of beauty, gentleness, grandeur, and fidelity in heraldry. Silver (white): purity, innocence, frankness, and nobility.
The flag is generally stylistically close to Art Nouveau, as are the patterns on the Plava Laguna bracelets and shoulder straps.
At the base of the flagpole is the Sri Yantra – one of the most powerful sacred geometric symbols in Hinduism and Buddhism (nine intersecting triangles): it symbolizes the four cardinal directions, the harmony of spirit and matter, the transformation of negative energy into positive energy, the geometric embodiment of the divine mother (Shakti) and the goddess of prosperity, Lakshmi, etc. Accordingly, the Lakshmi Star (an eight-pointed star (octagram)) is the main symbol of the goddess Lakshmi and her eight divine forms (spirituality, abundance, courage and strength, progeny, victory and success, knowledge, happiness, and good fortune). The lotus flower represents the creative principle, the womb from which the universe and divine beings are born. The tree of life/cosmic tree connects all forms of life together, a map of the universe, etc. I believe all of this may be characteristic of Vates Cosmicus civilization, since their representative directly participates in the mission to save life in the universe, sacrificing himself.