yellow
顑 centers on the color yellow, specifically a yellowish hue, often associated with the face or complexion.
顑 combines 咸 (possibly phonetic) with 頁 (head), suggesting a yellowish complexion of the face. The exact historical development is uncertain.
The left side 咸 can be thought of as a container, and the right side 頁 is a head. Imagine a head turning yellow like a container of turmeric: 顑 means yellow.
For カン, picture a can of yellow paint spilling over a head: can -> カン, and the head turns yellow.