tosafos in succah says yerushalmi is mashma it is green but bavli is mashma it is blue. tos chulin 47b is also clear it is blue. Also Josephus amongst other chachmei umos haolam who saw techeiles say it is blue.
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tosafos in succah says yerushalmi is mashma it is green but bavli is mashma it is blue. tos chulin 47b is also clear it is blue. Also Josephus amongst other chachmei umos haolam who saw techeiles say it is blue.