ill check for chamomile, it seems most likely, but iilll double check
Rosemary oil generally is used for darkening. I would say the sun. I know that at the beginning of every summer my hair starts off brown but ends up with bright red undertones from the sun bleaching it out. If you happen to use anything with chamomile or lemons that would be another reason.
when my hair was shorter it was always really dark like black, im not sure if sun bleaching is to blame or rosemary oil or others, or both? or is my hair just getting lighter from age or something genetic? idk..what do you think?