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Yes its the festival of colors, glitters and noise :) The colors differ from dance school to dance school. What they do is, that every city has it's own style of costume. Some of the are using symbolism from original Taino culture (like on the first picture - mask as a resemblance to solar deity, their solar god and typical trousers with shells. Others have a strictly colonial and post-colonial symbolism, like the devil mask with hen on the top. Anyway the colors differ from flame/sun related (on the pictures), through green (my guess is symbolism to ever green nature here) to blue (which relates to sea and ocean). All these schools during carnival travel through island doing shows in costumes during festivities. Cannot imagine how they carry on with all that energy whole month :D