So your argument is "Other teams have fucked about with their kits, so it's alright for us"?
Barca have changed their kit, but it is a few times in their history – otherwise it is claret and blue stripes! To dismiss off-hand the comment "oh that's Barca" is over simplifying the statement too. Barca's colours are unique to them, they are unmistakeable – unfortunately, ours aren't, there are half a dozen sky-blue teams in Europe, some with more European pedigree... strangely though, those teams never seem to fuck about with their kits!