Colorless

a.
  1. Without color; not distinguished by any hue; transparent; as, colorless water; a colorless gas.
  2. Free from any manifestation of partial or peculiar sentiment or feeling; not disclosing likes, dislikes, prejudice, etc.; as, colorless music; a colorless style; definitions should be colorless.
  3. having lost its normal color.

[Narrower terms: ashen, bloodless, livid, lurid, pale, pallid, pasty, wan, waxen; neutral; white]

[Narrower terms: blanched, etiolate, etiolated, whitened; bleached, faded, washed-out, washy; dimmed, dulled, grayed; dirty; dull, sober, somber, subfusc]