The fact the zip ties are unmatched in color serves a very important purpose. I know it is important or I would not have done it that way. Don't ask me what that purpose is,,,,,,,,,,,,,,, I have eaten and slept since the zip ties were installed. When and if, I do in fact recall the purpose, you will be the first person I tell.On the other hand, those zip ties are a big step up from the hose clamps I would have used - although - my zip ties would match each other, of course!
PS; it may have also been, simply because it was the last two heavy duty zip ties I had on hand.