achromatic.

1. Lacking a distinct color hue, as in black, white, or gray.

2. Designed to reduce the separation of colors caused by a lens.

Use it for

Words that belong together

• achromatic palette
• achromatic image

On the page

The achromatic palette made the red indicator seem brighter.

Usage notes

Primary category: sensory / description. Forms: Normally non-gradable; no ordinary comparative or superlative. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: description. Commonness: uncommon.