Thanks John - I realised my mistake after closely examining my lines of
code to the examples. I think I got confused because some parts of xlwt
(Style.py line 514) seem to provide mapping of the Americanised
(Americanized? ;) ) spelling of color.
I do spell it "colour" by the way, I'm just used to programming languages
Cheers, and thanks for an extremely useful and otherwise straightforward to
use module :)