Tungsten (How to get really blue)

Tungsten film is balanced for indoor photography under tungsten light, and is primarily used to eliminate the orange tint caused by (tungsten) light bulbs, and gives the final image a natural color balance.

When shot outdoors, tungsten film produces a strong blue cast, an effect which is often used purposely to create different color contrasts making it look like night or better showing up water

Ideas for use have included daylight films so they look like night to do this you underexpose the film commonly done in movies

There is a heap of explanation as to  why tungsten does what it does but above is the shortened version if you want the full explanation try out Tungsten Film.

Photo by the amazing Nathan Seivwright