tokei
Tokei (時計) is a clock.
mechanics
Press m to toggle between 12-hour, 24-hour, and decimal clock modes.
Press i to invert interface colours, which can be customised by adding a URL hash with two hex triplets separated by a hyphen-minus for the background and foreground respectively:
https://lab.avanier.dev/tokei#030303-e4e4e4Configurations are saved locally.