achromatic

adjective4

1. •
   Free from color; transmitting light without color-related distortion.

   • The designer chose an achromatic color scheme of black, white, and gray.
2. •
   Containing components such as achromatic lenses and prisms, designed to prevent color-related distortion.

   • An achromatic lens reduces color distortion in optical instruments.
3. •
   Uncolored; not absorbing color from a fluid.
4. •
   Having only the diatonic notes of the scale; not modified by accidentals.