If a playing attire item comprises three or more colours, one must be clearly dominant on the surface of that item. For hooped, banded, striped or checked items (i.e. with two dominant colours), any use of a third colour must not dominate or affect the distinctiveness of the shirt or socks.
The dominant colour (or colours in the case of hooped, banded, striped or checked items) must be equally visible on the back and front of each item of playing attire, excluding the number zone on the back of shirts (see(b)).
The colours used to create a hooped, banded, striped or checked shirt on the front must both be clearly visible on the back of the playing attire if the same pattern (e.g. stripes) is not used on the back of the playing shirt.
No material used in the construction of playing attire may be reflective or change its colour or appearance under any external influence (pressure, light, water, etc.). This includes material used for numbers, player names, sponsors or charity logos.
Both the sleeves on shirts must be identical in colour and appearance (e.g. pattern or design), except in the case of hooped, banded, striped and checked shirts, on which each sleeve may be one of the two main colours.
Shirts that comprise small horizontal or vertical lines that cover the whole length or breadth of the shirt, do not exceed 2mm in width (pin stripes) and are spaced at least 5cm apart do not constitute striped shirts.
Colours and their contrast are measured in accordance withto ensure compliance with the above provisions.
Any clothing or accessories that may be worn under, over or in addition to playing attire and may be visible on the field of play is considered special equipment worn on the field of play, for which specific rules are set out in.
The choice of pattern is unrestricted with the following exceptions (to be assessed at the sole discretion of the UEFA administration):
the pattern must be non-pictorial, e.g. it must not contain any images, illustrations or any other symbols (any pattern that does not satisfy this requirement will be considered as a decorative element);
the pattern must not allow a reasonable person to identify a manufacturer or sponsor relevant to the equipment (any pattern than does not satisfy this requirement will be considered a trademark).