The Collaborative International Dictionary of English v.0.48:

Wanness \Wan"ness\, n.
   The quality or state of being wan; a sallow, dead, pale
   color; paleness; pallor; as, the wanness of the cheeks after
   a fever.
   [1913 Webster]

WordNet (r) 3.0 (2006):

wanness
    n 1: unnatural lack of color in the skin (as from bruising or
         sickness or emotional distress) [syn: lividness,
         lividity, luridness, paleness, pallidness,
         pallor, wanness, achromasia]