not clearly visible
inconspicuous - hidden
Somebody or something ‘inconspicuous’ does not stand out and is therefore not easily noticed or seen. This can come about unintentionally, such as due to the bland design of something, or be done intentionally in order to avoid unwanted attention. Has both positive and negative connotations.
I didn’t want my boss to see me leaving work early on Friday, so I tried to be as inconspicuous as possible as I exited the office.
Little is known about that CEO. Her inconspicuousness is unusual considering the company’s high profile.
The new computer program operates inconspicuously in the background, so you won’t have to worry about it interfering with your work.