dusk vs pallidity

dusk

• The condition of being dusky; duskiness 

• A darkish colour. 

• A period of time at the end of day when the sun is below the horizon but before the full onset of night, especially the darker part of twilight. 

• Tending to darkness or blackness; moderately dark or black; dusky. 

• To begin to lose light or whiteness; to grow dusk. 

• To make dusk. 

pallidity

• The state of being pallid or pale.