We would not take into consideration brown and yellow (fluid) after purification.
Sunan Abi Dawud Book 1, Hadith 307
← Previous Hadith Umm Habibah daughter of Jahsh had a prolonged flow of blood. The Prophet (ﷺ) commander her to refrain (from prayer) during her menstrual period; then she should wash and pray. If she sees anything (which renders ablution void) she should perform ablution and pray.

Abu Dawud said: This is the view held by Malik b. Anas.

Sunan Abi Dawud Book 1, Hadith 306 Next Hadith → The name of Umm al-Hudhail is Hafsah daughter os Sirin. The name of her son was Hudhail and his husband 'Abd al-Rahman.

Sunan Abi Dawud Book 1, Hadith 308