The light blue areas in the slider currently seems to show civil twilight. Since I am more interested in the nautical than the civil twilight, I would like either all three twilights in somewhat different colors, or the ability to select which twilight(s) I want to indicate there (possibly with some kind of marker at the boundaries between multiple types of twilight). Also a solar noon marker would be nice (both on the slider and in the graph on the map). Alternatively, the solar noon could also be stated in the "more detailed" info box, not only the "less detailed" 8).