Colorless \Col"or*less\, a.
   1. Without color; not distinguished by any hue; transparent;
      as, colorless water; a colorless gas.

   Note: [Narrower terms: {ashen, bloodless, livid, lurid, pale,  pallid, pasty, wan, waxen}; {neutral}; {white}] [Also
         See: {achromatic}, {colorless}.]
         [1913 Webster + WordNet 1.5]

   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.
      
[1913 Webster]


   3. having lost its normal color.

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

   Syn: colorless, uncolored, uncoloured.
        [WordNet 1.5 +PJC]