It doesn't really make sense to include colors that BMW calls "Black" anyway. Otherwise you also get into the same subjectivity with greens, violets, silvers, etc. It's either called "Blue" or it isn't, regardless of how it may appear in certain lighting conditions.
So, unless anyone knows of any more colors that originated as M exclusive blues, I believe the complete, chronological list is in MFNATIK's post #19 above.
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