Daughter had dark almost slightly dark green tinged stool after eating a lot of chocolate and candy from easter could that still be te cause?

Rapid transit stool: Bile from the liver aids in digestion and is usually changed by bacteria in the intestine to the familiar brown color one usually associates with normal bowel movements. A major dietary change, such as eating a lot of chocolate, could alter the transit time of digestion and cause stools to remain a dark green. Stools can also be dark green during the recovery phase of a viral gastroenteritis.

Food Coloring: Most likely it is from a food coloring that was in the candy. I would advise against candy binging ... but there shouldn't be any serious problems with this. If not better in a week I would consider having it evaluated.