How do I change the background color for every line in a ListView?

Question

C# wpf - This code changes the entire ListView background:

<ListView x:Name="gLVwCities" 
        Margin="5,0,5,0" 
        Foreground="#ffffff"/>

 

public void FillListView(ListView LVw, List<string> liststX)
{
    LVw.Items.Clear();
    if (liststX.Count > 0) {
        for (int iii = 0; iii < liststX.Count; iii++) {
            string stName = liststX[iii];
            LVw.Items.Add(stName);
            if (stName.Contains("blue"))
                LVw.Background = Brushes.Blue;
            else if (stName.Contains("yellow"))
                LVw.Background = Brushes.Yellow;
            else if (stName.Contains("black"))
                LVw.Background = Brushes.Black;
            else if (stName.Contains("red"))
                LVw.Background = Brushes.Red;
        }
    }
}

How do I change the background color for every line in a ListView?  Every ListView line background could be different ... one ListView line background could red, the next ListView line background could be blue.