An ornamentaldesign for a refrigerator door, as shown and described.
FIG. 1 is a front view showing my new design for a refrigerator door.
FIG. 2 is a front top left perspective view thereof.
FIG. 3 is a front top right perspective view thereof.
FIG. 4 is a bottom front right perspective view thereof.
FIG. 5 is a bottom front left perspective view thereof; and,
FIG. 6 is an enlarged front view of the top front central portion of the door which shows the circular elements that are flush with the flat forward surface of the door with a double dash line to show the boundary of this view.
The broken lines indicate unclaimed portions that form no part of the claimed design.