Dusky
Part of speech: adjective
Definition: Dimly lit, as at dusk (evening). A shade of color that is rather dark. dark-skinned
Dark
Part of speech: noun
Definition: A complete or (more often) partial absence of light.Ignorance.Nightfall.
Part of speech: adjective
Definition: Having an absolute or (more often) relative lack of light.Dull or deeper in hue; not bright or light.Hidden, secretWithout moral or spiritual light; sinister, malign.Conducive to hopelessness; depressing or bleakLacking progress in science or the arts; said of a time periodWith emphasis placed on the unpleasant aspects of life; said of a work of fiction, a work of nonfiction presented in narrative form or a portion of either
Example sentence: Outside of a dog, a book is a man's best friend. Inside of a dog it's too dark to read.