Namkcor has a point in that it'd cause some short-term POTENTIAL issues with members unaware of things. But on the same boat, f0 is right - the issue is rather trivial. More, I stress short-term. In the long run, new members would see the new color and not be aware of the old; current members would adapt in time. Therefore, there's little reason I find to object.
Post not eloquent due to whatever.