Peugeot 206 engines may use a cooling liquid of blue or green. If it's blue, it's REVKOGEL 2000. The name of the coolant brand at the plant is not known. However, you can make the REVKOGEL 2000 green antifreeze. The manufacturer also recommends the Procor TM108/Glysantin G33 coolant liquid.
It is necessary to bear in mind the peculiarity of these antifreeze-they mutate in contact with the details of the new engine system. This is not a critical issue, and after the first substitution, this is no longer evident.