ff1781b5_s___Tankionline__english__Wiki_Basic_Paints_Paint_Description
[Name of Paint] Blue [Turret Protection] 0% all weapons [Price (Cry)] 100 [Rank Unlocked] Recruit [Paint Description] 
This color was left in the official list as a tribute to a canceled project of amphibious tank called Sheatfish. It was supposed to use small rivers to get close to the enemy unsighted
Paints - Tankionline (english) Wiki
Paint Description