The main presiding deities in the sacred sanctum sanctorum of Jagannath Temple are the holy trinity of Lord Jagannath, avatar of Lord Krishna; Lord Balabhadra, his eldest brother; and Goddess Subhadra, their younger sister. Lord Jagannath is considered to a symbol of universal love and brotherhood. Unlike other deities created with stone or metal, these deities are carved out of sacred Neem logs and are placed on a bejeweled platform (Ratnabedi).
Apart from that, an anthropomorphic form of Sudarshan Chakra is worshiped as Lord Sudarshan and is placed next to Lord Jagannath. Also, there are idols of Madan Mohan, Sridevi and Vishwadhatri placed inside the sanctum sanctorum. It is believed that the worship of the deities predates the temple structure and may have been origination in an ancient tribal shrine.
All three main idols are in different colors, Lord Jagannath (black), Balabhadra (white) and Subhadra (yellow). Each color has its own significance in different religion. As per belief these color represents three races of humankind Negroids, Europeans and Mangoloiads. The sacred deities are decked with clothes and jewelry which is known as Vastra Shringar. A proper dress regime is followed for the deities at the Jagannath temple. Where the deities are dressed in different colors as per day- Sunday (red), Monday (black & white), Tuesday (5 various colors), Wednesday (blue), Thursday (yellow), Friday (white) and Saturday (black).
What is the significance of the siblings being worshipped together?