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In page Kallithea F.C.:

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As far as the selection of colours is concerned, they could not be anything other than white and blue, the Greek colours, since the initial movement of the local clubs aimed at the dynamic presence, which was easier to do under the blue-white flag. Of course, it is worth noting that both the white and the blue were the colors of the two main groups of the merger, ie Esperos Kallitheas and Iraklis Kallitheas.