not in middle earth they can't, because the author, J.R.R Tolkein, wrote his works and these races specifically to be representative of English/British peoples, and NONE of those people were of colour or were asian, meaning that by the definition of the author and his works, all of the people of these fictional races he created had explicitly defined appearances, traits, and histories, but you and the minority group of people who are actually defending this shitshow of a production dislike this and as such have on multiple occasions now pulled the 'racism' card as your main bulwark of defence because you have no actual point besides that, and just to be absolutely crystal clear about something, the made up character for this show 'arondir', the 'black elf', his character is described in all related media as being a silvan elf, which doesn't make any fucking sense because during the second age, the Sindar reconnected with their silvan brethren and the silvan elves all but ceased to be in terms of a society, not to mention that the language they all spoke died out and sindarin was the new de facto language of all silvan elves, so not only should he not be 'black' from a lore standpoint regarding elves of middle earth in general as not a single elf in any of the written works of tolkein ever ventured east or south enough where evolution would have allowed them to become darker skinned, but the writers are so incompetent they made up a new character (which is whatever) but they tried to shoehorn him into a faction of elves that during the second age functionally didn't exist anymore, so please go on about how anybody can be anything when everything that is written contradicts that notion and that we should all be praising how 'strong' and 'brave' these writers and production staff are for casting a black guy in a role he has no business being in regardless of whether he is a brilliant actor or not.