This may be for eye protection, not team identification.
grey is not a colour, it is a neutral
grey
The most popular colors of uniforms for Little League football teams is often white or black jersey and either black, white, or grey pants. Other jersey colors include red, grey, and blue.
it is silvery grey but mostly grey
Permanent colour doesn't wear off. Your natural colour grows out. If you were grey before you dyed your hair then the roots will grow out grey. Colour doesn't make your hair turn grey.
the final result influence the grey colour
The Roundheads typically wore plain, practical clothing in earthy tones such as brown or grey. They often wore metal helmets for protection in battle. Uniformity was not as strict as seen in modern military uniforms.
Pink purpp blue
The colour grey is a tone between white and black.
grey
GREY.
grey