The normal color of menstruation is dark red, bright red, brown, etc. It needs to be analyzed specifically. 1. Dark red: this is the most common color of menstrual blood, which is usually mixed with membrane-like tissues in the uterus, caused by the shedding of the uterine lining, and has a certain degree of stickiness. 2. Bright red: when the menstrual flow is heavy and the menstrual blood flows faster, it becomes bright red. If it only occurs in the middle days of menstruation and the menstrual blood does not exceed 80ml, it is normal. 3. Brown color: It is usually seen when menstruation has just arrived and is about to end, when there is less bleeding in the body, the blood flow is slower and the blood stays in the body for a longer period of time, which is manifested as brown color. Women are advised to observe their own physical condition, if there is delayed menstruation, prolonged menstrual period, etc., they need to go to the hospital in time, under the guidance of the doctor to deal with.