Unfortunately I don't understand what your problem is given the two screenshots. The first screenshot shows the skeleton preview, which provides tint black colors from the mesh and results in purple color. The second screenshot shows the material, which shows the untinted atlas texture. Note that the material preview does not apply any skeleton tint black colors, since it has no mesh, and the mesh provides the attachment tint black colors.
Please explain and show what actual problem you are having given the SkeletonAnimation GameObject in a scene.
