Synonyms for Faded (same or very similar meaning)
WordNet sense 1 (reduced in strength):
attenuate, attenuated, weakened, attenuateWordNet sense 2 (made less in size or amount or degree):
decreased, reducedWordNet sense 3 (having lost freshness or brilliance of color):
washed-out, washy, bleachedWordNet sense 4 (weak in color; not colorful):
colourlessFrom the ODE community, based on WordNetadd/edit