L lenses question and a White balance question

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Are the L series lenses always white in colour?
I ask this because i was lucky enough to be able to borrow a friends 100-400 L IS lens on holiday.Because of this i was very aware of my responsibilities to it's well being.
The problem was that although other photographers were quick to say nice things about the lens even if it was only attached to a D30 [since discovering the sharpening tool i have fallen head over heels in love with this old trouper again] but i was very self concious of anyone else not so amiable getting their grubby little mitts on the lense as well by hook or by crook.
Do they make the L series in black as well so it doesn't stand out in a crowd?


The next question,on my D30 the Auto White balance seems very blue and cool,i have been using the sunny settings on the white balance menu and it seems 100% better,any ideas please.
Thanks for looking.

I have enclosed a sharpened and unsharpened photo of Whitby Church taken on the D30,is it normally this soft?