Digressing to uniform, a long long time ago the MoD decided just that.
1st all 3 Services would wear the same, say a flying suit. 2nd, if not the same colour it would be the same pattern and same cloth. 3rd same cloth if a different colour.
This was embraced by the Army, Navy and Air Force. The Marines said the standard cloth was unsuitable and they needed twill or some such. Oh and there was a chap called Lovat who had a fetching shade of green.
Then the Army opted for 'free' cabbage kit, the RAF (aircrew) opted for 'free' grow bags and the Navy did their own thing.
But it fell to the RAF, with a very simple uniform to have 4 different coloured blue shirts, 3 of trousers, and countless styles of woolly Lilly.