Hashish is often a paste-like substance with varying hardness and pliability. Its color can vary from green, yellow, black, reddish brown, or most commonly light to dark brown. Psychoactive effects are the same as those of other preparations. It is sometimes believed that the effects are different, but those perceptions usually stem from the increased potency of hashish, as well as variations between regionally different Cannabis specimens that are typically processed into hashish.