pallor (n.) Look up pallor at Dictionary.com
c. 1400, from Old French palor "paleness, whiteness" (12c.) and directly from Latin pallor, from pallere "be pale, turn pale," related to pallus "dark-colored, dusky," from PIE root *pel- (2) "pale; gray" (source also of Sanskrit palitah "gray," panduh "whitish, pale;" Greek pelios "livid, dark," polios "gray;" Old English fealo "dull-colored, yellow, brown;" Welsh llwyd "gray").