colourless

adjective4

1. •
   Having little or no colour.

   • The servant to whom he put this question was a young fellow with chubby cheeks, small, dull eyes, and a round chin, covered with a colorless down. — 1867
2. •
   Water white.
3. •
   Lacking in interest or variety.
4. •
   Neutral in opinion or allegiance; centrist

   • They cannot, of course, assume a colourless position because they cater to the radical rank and file and would be branded renegades. — 1926