WordNet sense 1 (lacking in vitality or interest or effectiveness):

pale

WordNet sense 2 (lacking distinguishing quality or characteristics):

neutral

WordNet sense 3 (lacking in variety and interest):

colourless

WordNet sense 4 ((of hair) having lost its color):

white

WordNet sense 5 (abnormally deficient in color as suggesting physical or emotional distress):

wan

WordNet sense 6 (ghastly pale):

lurid

WordNet sense 7 (lacking brightness or color; dull):

drab

WordNet sense 8 (having lost freshness or brilliance of color):

faded

WordNet sense 9 (anemic looking from illness or emotion):

livid