NPR has been on it with their presentation lately, really enjoyed this article.
My eyes (blue) are virtually the only physical feature of myself that ever gets a compliment. A girl once told me I had nice blue eyes and the "longest eyelashes" she'd ever seen on a guy (ugh). I'm glad I favour brown eyes.
Just as arbitrary as indigo is the way The Indigo Girls named their band: “We needed a name, and so we went through the dictionary and looked for words that struck us, and that was one,” band member Amy Ray told NPR. “You know, we were like 20 years old, I guess.”
This is how I name everything.