Where I am in the UK, it is all black - we are expected to polish it black if it is not already.
Some guys may use something else for a local recreation game but they will not pick up national games that way and it is known. Generally, we are expected to wear all black, even though it is getting harder to find, I get mine as an import from the other side of the pond (and hope that Customs don't hit my order with 19% import VAT
)