Funny, when I first joined here like over 4 years ago now,
Indigo was way cool. Everyone was talking about
Indigo for a boy, and I didn't get it and thought it seemed girly because it was a color. I've come a long way with names since then, and think it's perfectly masculine, and its similarity to
Inigo helps a lot, too.
Indigo (the color) makes me think of a warm night in an exotic place. It's very adventurous, and the
Inigo [Montoya :P] association helps that too. So I'd pair it with other globe-trotting, adventurous things, like
Indigo D'Artagnan,
Indigo Porfirio,
Indigo Quatermaine, or
Indigo Sacheverell. Yeah.