Is a unicorn with a differently colored horn a possibility?

[ggg-2 3,555]

In part 1 of Twilight's Kingdom, in order to lure out Tirek, Discord disguises himself by taking the form of a unicorn. a brown unicorn with a blue horn. Which got me wondering if a unicorn having a horn that is a different color from the rest of their bodies is actually possible? (I'm not counting Sombra as he's not a normal unicorn but a corrupted one, and furthermore when we see Mirrorverse (good, uncorrupted) Sombra in the comics, he's a normal unicorn and his horn, like his body, was black) We've seen multicolored/spotted ponies before, such as Pip, Shining Armor's friend Gaffer from the comics, and Luna (maybe). So what about horns?

[Pastel 7,630]

We've never seen one, so I don't think it's possible.

[Silver Letter 1,832]

I think it would be quite odd and I don't think it would be possible.

[boiteporte 591]

They can always paint their horns, I guess. Could be part of what they consider as fashion.....

[Banul 3,831]

I don't think so. Discord is probably a special case because...well, because Discord.

[AlbaTross 1,586]

I don't think so. Discord is probably a special case because...well, because Discord.

He also isn't a unicorn. I don't know. Maybe different coloured horns are a possibility, but I'm drawing a blank on examples.