It is interesting how our eyes will not see minor differences on objects if they are separated from one another. This is true not only for color differences, but even height differences. I installed kitchen cabinets once on a floor that had a pronounced slope. On one side, the cabinets were separated with a 30" range between. One one side, the counter top was level with the range. One the other side, just 30" away, the counter top was 1-1/2" lower than the range. I didn't notice it when I installed them, so that's the way they were for 20 years. No one ever noticed the difference, and although we were aware of the difference, my wife and I didn't see it after a short time.