2 yr old vomits bile

My two-yr old daughter began vomiting yesterday afternoon. The vomiting continued into the night, at which point I called her DR, who said that as long as I was keeping her hydrated, there was no need to worry. This posed a problem b/c she could not even keep down water. At about 3am (the vomiting had been occurring at that point for over 12 hours), she vomited up a very dark green, almost bluish liquid. She had had NOTHING to eat or drink except water. Is this bile? I always thought it was yellowish-green...I don't know if I need to be worried.  

[CalGal]

Karasue, call the doctor again and bring him up-to-date. What's going on is not usual and she should be looked at.