All colors in stools are normal EXCEPT Black (tarry black), Red and Clay white (light grey).
The color and texture may depend on the food taken.
Babies on formula feeds can pass dark green stools- which may be interpreted by many as grey or black.
Green leafy vegetables can cause stools to be dark green in color.
Banana can cause grey to black threads in stools.
The food ingested may pass undigested in the same color.
If she is fine otherwise- with her activity, urination, food intake- you need not worry.
If you have a doubt, please take the stool sample and get it checked with your Pediatrician
Hope my answer helps you.
wish your daughter good health.