We would not take into consideration brown and yellow (fluid) after purification.  

عَنْ أُمِّ عَطِيَّةَ وَكَانَتْ بَايَعَتِ النَّبِيَّ ﷺ قَالَتْ كُنَّا لاَ نَعُدُّ الْكُدْرَةَ وَالصُّفْرَةَ بَعْدَ الطُّهْرِ شَيْئًا  

The name of Umm al-Hudhail is Hafsah daughter os Sirin. The name of her son was Hudhail and his husband 'Abd al-Rahman.