The phrase "hidden in plain view" is correct and usable in written English.
You can use it to describe something that is easily seen but not noticed or thought of. For example, "The solution to the puzzle was hidden in plain view the entire time."
The hilltop neighborhood of View Park, residents unanimously declare, is a secret hidden in plain view of metropolitan Los Angeles.
And fiction may be the surest and best place to preserve great loves: less perishable than a letter, less opaque than a dedication, hidden in plain view.
Actuaries must disclose their methods and assumptions, but this one has been hidden in plain view because it often goes by the name of a method that is widely used and is accepted by the Governmental Accounting Standards Board.
This Prairie-style café near the Public Theatre seems to serve as the NoHo crowd's cozy secret cabin, hidden in plain view behind a bright-red awning on an urban-wasteland block.
The designation Deitch applies here, which has been hidden in plain view for years, is that all of these artists have revived abstract painting through production methods handed down from Warhol's Factory.
Dying to Work includes incidents from industries and jobs that we do not commonly associate with injuries and fatalities and highlights the risks faced by workers who are hidden in plain view all around us.
The spiders were hiding in plain view.
Those women are telling us something that is hiding in plain view: Motherhood is really expensive.
Because the actresses were ambitious, they were seen as "ambitious," and his predation went on, hiding in plain view.
He discovered early on that one way to protect yourself from a gossip-loving culture is to hide in plain view, to become a character.
Here was a large wild ox with the speed and grace of a deer and an impressive set of horns, and it had been hiding in plain view, having never been officially discovered by science.
