Love it, Goog! And "indigo day"? I've never heard that term before. I am intrigued!
Indigo is what me and some peeps say instead of "blue". You know, when you're feeling like you just want to lay on the couch and melt into the cushions and your arms are to heavy to lift your toothbrush? Indigo. When you're angry for no reason and you want to yell and snap at the birds for chirping too loudly and the sun for being too bright? Indigo.