code: public final void setHintTextColor(final ColorStateList colors) {
          this.hintColor = colors;
  
          if (getAdapter() != null) {
              ProxySpinnerAdapter proxyAdapter = (ProxySpinnerAdapter) getAdapter();
              setAdapter(proxyAdapter.getAdapter());
          }
      }
docs: Sets the color of the hint, which should be displayed, when no item is selected.
  
  @param colors
  The color, which should be set, as an instance of the class {@link ColorStateList}