I haven't noticed any other colors except for bits of what looked like seeds in other colors.
Several times I've seen these brown (really dark brown to even black) bits. According to your reply, they may have come from my gallbladder which seems likely to me and does make me feel GOOD knowing they got out.
I think my fundamental issue/question is because my main visible stone on ultrasound is large and at or in the neck, how easy/likely is it that I can keep flushing these smaller bits? I think it must be easy/likely if in fact that's what I've flushed out so far. Even if I were to be like hanna (hasn't replied to my message but I hope she see this) and let a larger stone float while keeping everything else clear and feeling good and symtpom free, I'd be a happy camper.