In this example, I'd like to change the color of the Callout Leader and the CalloutMarker to Black. Possible?
 
data1 = Table[{x, 4.9 + (0.2*RandomReal[])}, {x, 1, 10}];
poi = {
   Callout[
    {8, 2.5},
    "point of interest",
    {7, Automatic},
    CalloutMarker -> Arrowheads[0.05]
    ]
   };
eplot = ListPlot[{data1, poi}, PlotRange -> {Automatic, {0, 6}}, 
   ImageSize -> Small];
Print[eplot];
