Panaracer coloured sidewalls

OK, may be a stupid question, I like Fire XC Pro's and they come in different coloured sidewalls, nothing suggests this is anything more than tarty colour coding, nothing on Panaracers own website even mentions it, so do the colours mean anything (I like red but wouldn't pay extra for it) or not?
Current steed - Whyte T129, 2013 frame, mongrel Revelations, Giant dropper, Stans S1 wheelset. 12, Magura Trail Sport brakes, 1x11. 12.8Kg
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There is no secret ingredient - Kung Fu Panda
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Parktools
Thanks, Black is the new Black I think!
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools
2012 boardman team F/S tarting has begun..
1992 cannondale m1000 still going just
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools
http://www.panaracer.com/mtb.php#fire_xc_pro
In fact there is no Fire XC without the Pro (maybe was once?)
Just pay the postage
Now for sale Fatty