Navigation bar buttons color

You can change the navigation color dynamically using the following function. Basically it checks if the given NavigationBar background color is light or dark and sets the appropriate theme to the buttons. Setting a specific color to the buttons is not possible.

private void setNavigationBarButtonsColor(Activity activity, int navigationBarColor) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        View decorView = activity.getWindow().getDecorView();
        int flags = decorView.getSystemUiVisibility();
        if (isColorLight(navigationBarColor)) {
            flags |= View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR;
        } else {
            flags &= ~View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR;
        }
        decorView.setSystemUiVisibility(flags);
    }
}

private boolean isColorLight(int color) {
    double darkness = 1 - (0.299 * Color.red(color) + 0.587 * Color.green(color) + 0.114 * Color.blue(color)) / 255;
    return darkness < 0.5;
}