Photograph in low light on purpose!

To get the people silhouetted I exposed for the highlights on the water and opened up one f-stop; in-camera meters tend to want to expose whites as gray.  Image was color tinted and vignetted to emphasize the mood of a dreamy summer day.  It could be done with an orange filter on the (telephoto) lens, or in post-production in Photoshop, as was done with this image.  A  deep blue filter could make the image have a terrific moonlit feeling. Brisbane, Australia.