When I use of plot in Mathematica, this uses of default colors for plotting.
Plot[{Sin[x], Cos[x], Tan[x], Cot[x], Sinh[x], Cosh[x], Tanh[x],
Coth[x]}, {x, 0, 2 \[Pi]}, PlotRange -> {-1, 1}]
How can I find the RGBColor of default used color in Mathematica in order to utilize manually them in the future (when I want to use RGBColor in some purposes)
