What is the colour for Navratri Day 4 and what does it signify. Maa Kushmanda, believed to be the creator of the universe, is worshipped on the fourth day of Navratri. This year, the colour for Day 4 of Navratri is royal blue. The colour is often associated with peace, confidence, strength, and prosperity. Royal blue also symbolises royalty, luxury, power, authority, trust, and tranquillity.