Based on your description:

"I had a book series in high school that was about magic and witches, each book was titles something about a color, so blue and red, white and silver all different books but I can't remember the name of them or the author. It is not the wicked years series by R.L. Stein I believe it was about a girl who finds out she is a witch, and can do magic, I remember there was a book titled blue is for water maybe, There was also a book in the series with silver in the name"