Is the act correct in performing ghusl (ritual bath) after not seeing the white discharge (al-qassah al-bayda') on the seventh day, and seeing yellow discharge (as-sufrah) instead? And is it necessary to make up the prayers of the seventh day in this case, and in the case of the white discharge being seen belatedly on the eighth day?

A woman knows she has become pure by one of two signs: dryness (al-jufuf) or the white discharge (al-qassah al-bayda’). If she sees either of them, she must perform ghusl immediately. The yellowish discharge (as-sufrah) is not a sign of purity; rather, it is considered menstruation if it occurs during her usual period or if it is continuous with blood. A woman remains in a state of menstruation as long as blood, and anything connected to it such as yellowish or brownish discharge (kudrah), is present. If the blood and yellowish discharge cease, and dryness or the white discharge appears, she must perform ghusl and pray. If she sees the sign of purity after midnight, she is obligated to perform ghusl and pray Maghrib and ‘Isha. Delaying ghusl after seeing dryness is a mistake that necessitates making up thesed missed prayers.