Colour Klues
The opening shot reveals a red/black colour scheme that relates directly to Somerton, which features black cloaked people and red carpeted floors. The use of the black against red not only makes the red more rich, but thematically it counters the use of the red/blue colour dichotomy.
Kubrick is establishing colour meaning and correlation in the opening scene that continues throughout the film - even with the stoy store scene at the end.
To me, from the get go there seems to be three colour schemes with potential thematic meaning:
Black and white
Red and Black
Red and Blue
And then of course the rainbow. Where it all gets very confusing..
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