Use new alpha colormap

napari_tiff/napari_tiff_metadata.py

@@ -325,7 +325,7 @@ def get_ome_tiff_metadata(tif: TiffFile) -> dict[str, Any]:
             colormap = int_to_rgba(int(color))
         elif is_rgb and len(channels) > 1:
             # separate channels provided for RGB (with missing color)
-            colormap = ["red", "green", "blue", "alpha"][channeli]
+            colormap = ["red", "green", "blue", alpha_colormap()][channeli]
             if not name:
                 name = colormap