Exactly what color is a Russian Blue's coat? I have noticed in some pictures Russian Blues seem to have a blueish tint to their coat and in other pictures their coat looks more silvery. BTW, your pictures are a good example of this variation.
Most of the time they look silver but sometimes depending on light they can look blue. It varies between cats too. Orion's father Silver Phantom is very silver, so Orion has taken that characteristic from him.
You'll notice that in some pictures he looks really light and in others much darker. All depends on surrounding lighting I think.
Like this attached picture...he looks really light...