ELI5 Surnames - why Green, Brown and Black are popular surnames but Blue, Orange and Red are not?

ELI5 Explain Like I'm 5: Bite sized answers to stuff you should know about - in a mini podcast

Why do some colors make for popular surnames (like Green, Brown, Black), but others don't (like Blue, Orange, Red)? Why are there so few Korean surnames? What is the queen's last name?

... We explain like i'm five!

Thank you to the r/explainlikeimfive community as always and in particular the following users whose questions and comments formed the basis of this discussion: c0mandr, jilinoppaa, adioscorea, awoelt, jogan598, macgyvermacguffin, alphagammabeta1548, dublinirish & taurius

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