What does Nawrocki's outfit say at the gathering with Zelenski? The colour of the tie is no coincidence

When the eyes of the planet were directed at political declarations after the encounter of Volodymyr Zelenski with Karol Nawrocki, 1 item escaped the attention of many observers. The President's dress wasn't random, even the colour of a tie in diplomacy can be a message. What was he trying to say this time?