I absolutely do not get FIFA's clash rules. Where is the problem when shorts and socks have a similar or the same color? Almost everybody uses the shirt alone to distinguish the teams.
In 2002 white vs. yellow was the World Cup final, both paired with dark shorts. In 2014 Germany was not allowed to wear all white vs Brazil, but why?
Look at this Bundesliga matchup. Both teams wear black shorts. And both teams also have black raglan sleeves. But it was no problem because the main color was different.
Why are FIFA nowadays making such a big fuss about small clashes? That is totally needless. Assign each team a home and a secondary COMBINATION of shirt, shorts and socks. And just like in FIFA video games there should be absolutely no mixing of parts between the sets.