Third day of Navratri is celebrated as Maha Tritiya Navratri Durga Puja or Sindhur Tritiya or Sowbhagya Teej or Gauri Teej. In 2015, third day of Navratri date is October 15.
Navdurga and Dasamahavidya Goddesses are worshipped during Navratri puja in North Indian states but in South India Navadevi avataras are worshipped. In Tamil Nadu and Kerala, Saptamatrika and Ashtamatrika puja is observed.
Annapurna Puja is observed during Navadevi puja in South Indian temples. Vijayawada Sri Kanakadurga is decorated and worshipped as Gayatri Mata on third day of Dasara Navarathri celebrations 2015.
Chandraghanta Puja is peformed as part of Navadurga worship. Chinnamasta Dashamahavidya is the Goddess to worship on third day as part of Navratri Dasamahavidya puja.
Koumari Puja is observed as part of Saptamatruka and Ashtamatruka Puja in Tamil Nadu and Kerala.
Third day of Navratri is celebrated with lot of gusto in Maharashtra and Gujarat where it is known as auspicious day to perform Suvasini Puja (worship to married women).
Yellow is the colour for 3rd day of Navratri. Yellow color dresses or saris are worn by women devotees and Goddess is also decorated in Yellow attire.