sunrise, dawn
倝 centers on the first light of day: sunrise or dawn, the moment the sun appears.
The exact historical development of 倝 is uncertain. It appears to combine 人 (person) with a left side that may represent the sun rising, but the component origins are not clearly established.
The left side looks like the sun (日) breaking through the horizon (十), and the right side is a person (人) witnessing the sunrise.
For カン, imagine a person watching the sunrise while holding a can of coffee: can -> カン, and the dawn light fills the scene.