wan
become pale and sickly
lacking vitality as from weariness or illness or unhappiness
a wan smile
pale
pallid
abnormally deficient in color as suggesting physical or emotional distress
the pallid face of the invalid
her wan face suddenly flushed
sick
(of light) lacking in intensity or brightness; dim or feeble
the pale light of a half moon
a pale sun
the late afternoon light coming through the el tracks fell in pale oblongs on the street
a pallid sky
the pale (or wan) stars
the wan light of dawn