Black is really really different and estranged.
Blue is innately normal found in pretty much everybody. If I can't see your color you are definitely just blue that day no matter how you feel and no matter what you tell people. Notorious liars, too, to boot.
Red. Brotherly love. Sibling rivalry. Family. Sisterhood. Friendships. Relationships that're young.
Green. Really, really weird.
Purple. Not used.
I was hoping to add a lot more of my ideas I've used to incorporate into my Survivor character ideas we have here on this board like the BoF Dragon Tear that shows / displays multiple-color shards. I was thinking about doing something like the Blood Types in SaGa Frontier/Revelations Series Persona (That's not birthdates, that's Wang Long!!!), - I think that's actually really important in RPG culture and the zodiac signs that lead you up to the 13th one in Final Fantasy Tactics...
I already have some prime examples of Survivor characters that display a clear Color Symbol / Sign on the chart. Like, for instance, I think everyone would agree with me that Matthew von Ertfelda is definitely Black. And a prominent character like Deena Bennett who's obviously a cop is most obviously a Blue character.
But before that I have some personal favorite Survivor characters of mine at my disposal I think, I feel deserve a color or a shade that's off the chart like Zeke Smith is most-likely Grey or whatever I said in the Edgic Thread. And I've been toying around with this Spec. Idea since Amazon and I think Heidi Strobel definitely gives off a sepia-tone color vibe like from Final Fantasy III-Super Nintendo Entertainment System wet-cardboard videogame box smell that's like nostalgia.