On a different note, each of the Big Three clubs in Portugal will have the same sponsor for the upcoming season. The one they've chosen for their away shirts is quite unfortunate, and Porto's implementation of same on a "sea foam" coloured ground is particularly unfortunate:
What is going on with their colours? I noticed they appeared to have switched to an all black first kit a few seasons ago by careful study of Endsleigh League Extra but for some arcane reason the placement of a white & red kit on the left of the photo below makes me wonder if that's now the "home" kit.
I would be amazed if Barnet had changed their colours from amber and black. I was guessing, I'd say that they are second and third kits although, as you rightly say, they have worn all-black before.
It won't surprise anyone that I had the exact same question when I saw those. Even if they haven't abandoned their traditional colours entirely, the apparent shift from amber to orange is something to be decried.
A quick check on here indicates that Barnet have been responsible for some truly horrendous kits over the last few years (and historical kits lists the all-black one as their home kit, which is good enough for me): http://www.historicalkits.co.uk/Barnet/Barnet.htm