Gamma Sigma Sigma's colors are Maroon and White.
The flower is the White Rose.

Colors: Royal Blue, Pearl White (and, of course, a classy touch of Gold)
Flower: Red Carnation

I agree.

http://amityheritageroses.com/MellowYellowWRRtn.jpg

our colors are pink, baby blue, and black, and our flower is the pink tea rose...

Tau Kappa Epsilon's colors are cherry red and gray, while our flower is the red carnation

Alpha Sigma Tau
 

Alpha Sigma Tau's colors are Emerald Green and Gold. Our flower is the yellow rose.

We all make such a lovely bouquet!

Sigma Alpha Iota colors: Crimson & White
Sigma Alpha Iota Flower: Red Rose

Phi Sigma Pi Colors: Royal Purple and Gold
Phi Sigma Pi Flower: White Rose

Pi Phi's colors are wine and silver blue and our flower is the wine carnation

Kappa Lambda Psi's colors are navy blue and gray, and our flower is the morning glory =)

Delta Upsilon's colors are Old Gold and Sapphire Blue (A classic combo many times copied.) We don't have an official flower or mascot or symbol, or much of anything, helps keep things simple for the non-secrecy thing!!!

As an addition to Alpha Phi Soroity, "Alpha Phi’s original colors were blue and gold. In 1879, noting that a fraternity had colors too similar to hers, Alpha Phi adopted the more distinctive colors of silver and bordeaux. Members wear their colors in the form of a ribbon of silver/gray and bordeaux, under their badge to acknowledge special occasions, the installation of a new chapter, the anniversary of their chapter’s installation or the celebration of Alpha Phi Founders’ Day, October 10." -Alpha Phi Official Website

Kind of a neat coincidence since they are our sister organization.

Do you by any chance go to Marist?

Yeah she posted an introduction thread in Greek Life I think.

And everywhere else too... *whistles casually*

Here we go again.

Well purple is a royal color.

Sigma Phi Epsilon's colors are Purple and Red. I think gold is unofficially a color because we use it when we show our letters.
Our flowers are the violet and dark red rose.

I am not in a NPHC, but a good friend of mine is the president of her chapter, and she has echoed this that it is forbidden to wear NPHC letters with different colors.