My neighbour's potted plant sported an exotic smelling blue flower. She had bought in at a nursery in Yerkaad ( near Salem, Tamizhnadu) and told me that they called it Yesterday- Today - Tomorrow.
The flowers blossom in a deep blue colour and then change into light lavender and become white . They have a lovely fragrance.The deep blue can be seen in the next shot.
The Botanical name is Brunfelcia pauciflora
This is also called Day- Noon- Night ; Kiss Me Quick. A native of Brazil.