Their very blackness made them almost invisible against the dark plain.

They say they're almost invisible against a storm, you know.

Viewed from a distance, it was almost invisible against the white landscape.

His form invisible against the wall outside the building, this being had become a specter of the night.

Argus was nearly invisible against the darkness of the wall ahead.

The hand dropped; the figure crouched and became invisible against the darkness of the wall.

By the time the peacock went out, I was invisible against the sea and they had turned back.

With its white fur, the rabbit was almost invisible against the snow.

A figure stood beside the table; yet it was invisible against the darkness.

They muffled themselves all in white to be invisible against the snow.