noun, noun which may take the genitive case particle 'no'
peacock blue
A vivid greenish-blue color, named after the plumage of a peacock. Used as both a noun and a no-adjective.
彼女はピーコックブルーのドレスを着ていた。
She was wearing a peacock blue dress.
この壁紙はピーコックブルーで、部屋が明るく見える。
This wallpaper is peacock blue, making the room look brighter.