For all competition matches, teams must submit the agreed playing attire colours to be worn for each match via the dedicated online tool. The home team has the first choice as to which of its official sets of playing attire registered online it wears for its home matches.
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In the preliminary round, round 1 and round 2, the proposed colours will be validated on-site by the referee team.
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As of the group stage, the proposed colours will be validated in advance by the UEFA administration.
In any case, if the referee notices on the spot that the colours of the two teams could lead to confusion, a final decision on the colours is taken in consultation with the UEFA match delegate and the UEFA administration. As a rule, in such cases it is the home team that has to change colours, for practical reasons.
For the final, both teams may wear their first choice playing attire. However, if there is a colour clash, the team designated as the away team must wear alternative colours.