COLOURS AND WHAT THEY CAN CONNOTE

Different colour create different meanings. In 'Don't look now' the most obvious colour coding was red:
The young girls red coat,
The red blood,
The red flowers,
The red paint,
The red pavement,
The red pillars atc
Red connotes love, danger, anger and death - which fits in excellently with the narrative image.
The young girl who dies from drowning at the start of the movie wore a long red coat, connoting the strong love bond between her and her father. Yet, towards the end of the movie, the serial killer who ends up killing the dad himself wore a long red coat similar to that of the daughters. The red which connoted 'love' has transformed into the red which connotes 'danger' and 'death' as the story unravels.