unnoticeable
Definitions
Not easily perceived or observed; inconspicuous.
So small or subtle that it escapes attention.
Examples
The small scratch on the back of the phone was almost unnoticeable.
She made an unnoticeable adjustment to her posture while sitting in the chair.
The transition between the two colors was so gradual that it was practically unnoticeable.
Synonyms
inconspicuous imperceptible indistinguishable obscure subtle unobtrusive hidden
Antonyms
noticeable conspicuous obvious prominent evident striking distinct