[s1e2] - Purple Giraffe

Is there a color association with each of Ted's main girlfriends?

After discovering from Lily that Robin actually has a crush on him, Ted decides to prove he isn't "intense" by throwing a "casual" party. [S1E2] Purple Giraffe

Barney introduces his first made-up statistic: at every New York party, there is a girl who knows no one and is a "prime target" for a hookup. The Meaning of the "Purple Giraffe" Is there a color association with each of