The present disclosure provides a display panel, a display device and a manufacturing method thereof to improve an effective display region of the display panel. The display panel comprises a plurality of pixels arranged in an array, and a black matrix between every two adjacent pixels, the display panel also comprises at least one display member displaying a preset color, and each of the at least one display member is arranged on one side of the black matrix between two corresponding adjacent pixels close to a light-outgoing surface of the display panel.