Ships serving in the Baltic were painted in a mid-grey, tending toward the dark. Canvas was grey also. Decks were scrubbed wood, but not holystoned. Waterlines were usually painted in green, but red was also used on occasion.
Turret tops appear to be the same shade as the hull, and masts are black above the funnels. Boats were brown - and if they had canvas covers, these appear to be brown as well.
Russian ships do not seem to have used camouflage at all. Destroyers appear to be mostly of a shade lighter than the larger ships - however, this could be the result of photographic quality. They appear to have black decks on coal-burning vessels, as was common in other navies.
Ships serving in the Black Sea were painted as above, except in pale grey. Ships serving with the Arctic and Vladivostok squadrons appear to be painted in dark grey.
During the Russo-Japanese war, many ships at Port Arthur were over-painted in a pale cinnamon colour. However, this does not seem to have been used in WWI.