Is there a reason why some flags look similar?

Question

I noticed that some flags, like France, Italy and Ireland all have vertical lines, while other countries like Yemen, Armenia and Germany have Horizontal lines. Is there a reason why they share these traits?

In: 1

Answer 1

They base themselves off others or take similar traits as an homage or to represent ideas. For example the reason many ex colonial countries use tri color flags is because they are a symbol of republicanism and liberty while their colors may be cultural or a homage, for example the pan african or pan arab colors.