Be vary wary of 3rd hand gossip.
The colleague who told you this could have an axe to grind with you, the other colleague that supposedly said this or both of you, and stirring the pot.
My tuppence worth is, yes, I think most if not all, parents wonder how their children will look, and part of that will include what part heritage has to play.
Eg my dd barely looks like me at all! I'm very fair, burn very easily, light brown eyes, auburn straight fine hair, short, apple shaped (fat!), small nose, chin & ears, thinnish lips, round eyes. Typical Scot.
Dd takes after her father who is tall, slim (burgeoning middle aged spread beer belly notwithstanding), dark olive skin, very dark brown almond shaped eyes, black thick curly hair, Roman nose, prominent chin (both have same misaligned jaw giving the impression of an overbite), high cheekbones, good sized ears.
I somehow got into my head, without consciously thinking I had, that she'd look like me at birth, I was blonde, blue eyed, so pale I looked a bit blue!
Instead she was so dark she honestly was darker than a friends child born around same time who was the child of 2 parents of middle eastern heritage, her eyes were so dark they looked black it was hard to tell between pupil & iris, and she had a shock of black, curly hair.
Even as she's grown, while her skin has lightened a little she's very dark at the moment due to the hot sunny weather, her hair is now very long so the weight has removed some of the curl, but it still goes quite frizzy in certain conditions and she straightens it most days, curls unfortunately not currently being fashionable (if it were the 80's she'd be saving a fortune in perms).
I think it's probably likely somewhere in my ex's heritage is middle eastern or maybe even Asian or African ancestors. We know there was a great grandmother from southern Mediterranean area but we don't know any more than that. I don't think it's my side as we're all at darkest light brunette, with creamy skin being mostly scots/Irish heritage, lot of blonde & blue eyed folk though so we think probably some Scandinavian genes in there somewhere. So maybe dd will be the one to get a shock when she produces an ice white, blonde, blue eyed child.
I remember years ago watching an American 'talk show' of the Jerry sprinter/Oprah type but was a black man presented it can't remember his name. On one particular show there was a guy from a couple had dragged his wife on to do a dna test because he didn't believe their 2nd child was his - because the child had pale skin and blonde hair. He was a very dark Afro-Caribbean man, his wife was also Afro-Caribbean but not as dark. Aside from colour the child was the absolute SPIT of him inc a small birthmark. The dna test confirmed it was his child and his wife quite rightly demanded an apology for many months of accusation and hurt. The presenter was like 'you're an idiot!' And questioned did he understand how genetics worked, did he know that quite a few African-Americans had Caucasian ancestors? And then as a sort of 'extra' revealed that they'd tested his dna for heritage indicators AND traced some of his genealogy which revealed iirc a Caucasian I think great great grandfather on HIS side. On his wife's they'd actually had to go further back to locate the Caucasian ancestors. But genes can do weird and wonderful things.
My Dn (sisters child) looks nothing like either parent, but weirdly a lot like me with hints of his fathers brothers features. So that looks wise he looks like mine and my sisters-exs-brothers kid!
My sister looks like my fathers sister and mums brother combined.