(Imām Bukhārī narrates): Qutaibah bin Sa'id narrated to us, he said: Isma'il narrated to us, from Ayyub, from Muhammad, from Hazrat Umm Atiyyah (may Allāh be pleased with her), she said:
We did not count muddy and yellow color (as menstruation) at all.
Reference: Sahih Al Bukhari 326