Vim and python syntax question

[Charles Boncelet]

When running vim with syntax coloring on, sometimes I get
strong, dark colors and sometimes weak, pastel ones.  I
have no idea why the colors vary.  Anyway, how can I always
get the strong, dark colors?

Or, does anyone have a python syntax file of which they are
proud and willing to distribute?

(I'm running Vim 5.6-11 on linux.)
-- 
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Charles Boncelet, University of Delaware, <boncelet at udel.edu>
On sabbatical at ADFA, Canberra Australia, <boncelet at ee.adfa.edu.au>
Home Page: http://www.ece.udel.edu/~boncelet/