I assume you do not simply want the default color scheme, rather you want to be able to call into whatever the current cycle is.
This part of the documentation covers it in great detail, letting you do a lot of complex cycling of not only colors but other aesthetics too: theming - cycles
And to simply answer your question, in Makie you write color=Cycled(2) to do the equivalent of matplotlibs color=2, as seen in this part of the docs theming - manual cycles