Probably the edge had been chipped on the collar of someone's uniform.

Here was a child so clean he seemed to have been polished along with the brass crossed rifles on the collars of his uniform.

A hand grabbed the collar of her uniform, pulling her head forward.

He was pulling slightly at the collar of his uniform, looking vaguely uncomfortable in it.

A thin black wire ran from the device into the collar of the guard's uniform.

He reached for the collar of his uniform, and found his rank missing.

She fastened the collar of her uniform, stood up, and hit the control panel for the door.

He was blushing bright red from his silver hair to the collar of his blue uniform.

It hung like tiny flames over the collar of her dark blue uniform.

B'Elanna made an annoyed sound and fished around in the collar of her uniform.