Colors-McGonagall-Harry's Eyes

[silverdawn212000 <Silverdawn21@juno.com>]

No: HPFGUIDX 48616

Hi,

I'm new to the group, so I apologize if I am bringing up a topic that 
has been discussed before.

I'm rereading the Harry Potter books, and I have noticed a lot of 
references to color.

As everyone knows, scarlet and gold are the colors of gryffindor, and 
there are many references to these two colors:

"He raised the wang amove his head, brought it swishing down through 
the dusty air and a stream of red and gold sparks shot from the end 
like a firework." p. 85 PS/SS

'Standing beside its burnished bronze doors wearing a uniform of 
scarlet and gold, was--
"Yeah, that's a goblin," said Hagrid
p. 72 PS/SS (side note:  Why *are* the goblins dressed in gryffindor 
colors?)

In COS, Fawkes is described as red and gold as well. (207)

So, my question is...why does McGonagall, the head of griffindor, 
wear emerald green? (PS/SS 113) She even writes in "emerald green" 
(PS/SS).  Is it because she is evil?  Also, what house was she in 
when she was at Hogwarts.  Naturally, I assumed Gryffindor, but was 
she in SLytherin?  Does anyone know?

Also, why are Harry (and Lily)'s eyes green?  Why not blue, hazel, or 
brown?  Does JKR simply like green eyes, or is it a tie to 
Voldemort?  Or, does green not necessarily signify anything?

Hope I did okay with this post!
SilverDawn