The sunclock.net web page shows a 24 hour clock together with information about the sun for your location.
The colors show the golden hours, plus the three types of twilight you’ll encounter – Civil, Nautical, and Astronomical.
An unusual feature is that it can show the time counterclockwise (anticlockwise). About the only feature missing is – ironically – support for Dark Mode.
It has a dark mode now!
I love every aspect of this design.