Change colorPrimary and colorAccent via reflection

I'm trying to change colorPrimary and colorAccent programmatically, but I can't found any methods related with them, such as setThemeColorPrimary(int color). The only way I found is change it via Java reflection. But, I can't find colorPrimary and colorAccent fields to be reflected.

As my question above, how can I change colorPrimary and colorAccent programmatically?

Thanks in advance.