ComplexPlot Exploration

CPF[f_]:=ComplexPlot[f,{z,-3-3I,3+3I},
ImageSize->400,PlotPoints->50,
ColorFunction->{Hue[#8/(1+#7)] &},
ColorFunctionScaling -> False];
{CPF[z^3-z^2-2*z+3],CPF[z^2+z]}