Yes, there are actually two types of luminescent colors available for the Rolex Submariner, commonly referred to as the "water ghost." The two colors are green and blue, and they are known as SuperLuminova and Chromalight respectively. Both of these luminescent materials are known for their high quality and long-lasting glow, making them popular choices for professional divers who need reliable visibility in low light conditions.

SuperLuminova is a type of photoluminescent material that is made by the Swiss company, LumiNova AG. It is a non-radioactive, environmentally friendly substance that is used in a variety of applications, including watch dials, hands, and markers. The green SuperLuminova used on the Rolex Submariner is known for its bright, long-lasting glow, and can last up to 8 hours in complete darkness.
Chromalight, on the other hand, is a proprietary luminescent material developed by Rolex. It is a blue luminescent material that is known for its unique color and long-lasting glow. Unlike other luminescent materials, Chromalight is designed to emit a blue glow that is easier on the eyes, making it a popular choice for divers who need to stay focused in low light conditions. The blue color used on the Rolex Submariner is also more resistant to fading than other luminescent colors, making it a popular choice for collectors looking for watches that will retain their value over time.
Both SuperLuminova and Chromalight are high-quality luminescent materials that are designed to provide reliable visibility in low light conditions. Although both materials have their own unique characteristics, they are both popular choices for the Rolex Submariner and are considered to be among the best luminescent materials available on the market today.