How to change the color of the actionbar with Java code?

Question

Java

It is necessary to change the color of the topmost strip of the screen, where time, charging, and so on, as I understand it, is the actionbar, depending on the open window. Each window needs its own color. Navbar changed like this

getWindow().setNavigationBarColor(get.Resources().get color(R.color.colorname));

One line. For the second hour I have been looking for an analogue for such a change in the color of the upper band. Thank you.