unnoticeable

Adjective

• not drawing attention
  • an unnoticeable cigarette burn on the carpet
    
  • an obscure flaw
    

• not noticeable; not drawing attention
  • her clothes were simple and unnoticeable- J.G.Cozzens
    

• not obtrusive or undesirably noticeable
  • a quiet, unobtrusive life of self-denial
    

Related words

• Synonyms: 
  obscure , unobtrusive
• Antonyms: 
  noticeable , obtrusive