I think matching everything is so nice and it's fun it also makes it easier to recognise your stuff. I have been thinking of matching everything for both my horses. They can each have their own colors.
My issue comes with the fact that new stuff comes in all the time so matching everything is hard to stick to when the new gear comes out in colors that isn't what you're trying to stick to. Not unless you stick to the plan hunter green and navy blue which is kind of boring. I don't know of a single person that has truly stuck to one color.