inconspicuousness

/ˌɪnkənˈspɪkjuəsnəs/
noun
  1. The quality or state of being not easily seen or noticed.
    • Her inconspicuousness in the crowd made her the perfect person to observe the event unnoticed.
    • The small bird's inconspicuousness helped it hide from predators in the bushes.
    • The spy relied on his inconspicuousness to gather information without being detected.