A dim light similar to the one you get right as the sun is setting is an example of something that would be described as dusky.
A dark-red color is an example of something that might be described as dusky.
I like it when it is dusky, just before the street lights come on.
The dusky rose was of a muted color, not clashing with any of the other colors.
1911, James Creelman, Diaz: Master of Mexico, D. Appleton and Company, page v.
This man in shock has a silver colored dusky skin tone.