2d list contour plot

I have plotted a ListContour plot with a large set of data i have and most of the points do not seem to have a distinguised colour, i.e, the color function needs to be re-scaled for my data. How can i do that?

ListContourPlot[Pes, ContourLabels -> All, PlotLegends -> Automatic, 
ColorFunctionScaling -> False, PlotRange -> {{0, 180}, {6, 11}}, 
ColorFunction -> 
Function[{Enn}, ColorData[{"BlueGreenYellow", {-35, 150}}][Enn]]]