Me thinks I noted a tinge of sarcasm, there. I agree that there are two different shades of blue in your beautiful Palace roulettes, but are the shades different enough to make a new number code? I can see different codes for light to medium to navy but not for two shades of dark blue. It would not affect the value or the rarity. I see nothing wrong with keeping both to show in your collection. I have many shade variations in my collection, especially of clay poker chips. Bring them to the Riviera so I can see if the difference is more pronounced than it shows on scans.