Maybe the colors represent attempts to reach the island, either via communication or transportation... I can't crack the code, but here are the numbers I've been looking at:
Days in a row by each color: 12 black, 7 blue, 4 clearish, 11 black, 2 red, 5 black, 1 red, 4 black, 2 blue, 2 black, 1 blue, 1 red, 2 black, 2 blue, 1 black, 1 red, , 1 black, 2 red, 5 black, 2 red, 2 black, 1 red, 3 black, 2 red, 2 black, 1 red, 1 black, 1 red, 3 black

There are 54 black days, 14 red days, 12 blue days and 4 clearish days.

There are no red days in October, and no blue days in December.

Any other thoughts or patterns?

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