@Cherryana I wouldn't be offended, but I'd be bemused.
I don't have very good facial recognition or memory, so it's ALL a bit difficult for me.
people of certain nationalities are more difficult for me because I don't see much 'to hang my hat on'. Whereas with 'white' people there's not a standard build. Hair colour, height, as much as there are in others.
i work closely with a few Chinese people & they are all very different, I wouldn't mix them up, but I find it harder to remember which one is which because it's not as easy as 'the tall blonde' or the 'short red head' etc
However, when I was in Hong Kong it was a very odd feeling, very very crowded, everyone my height (discombobulating to see many many faces (when I usually just see chests/necks/shoulders etc) and to be completely honest, everyone did look the same en masse.
a town near us has a high population of Nepalese people & until I have 'a connection' with any of them personally I can't tell them apart.
it's not a colour thing per se, it's more of a hair, height, build thing.