I'd like to be able to change the dropdownlist background colors on my C# web app, can I do this with CSS instead of having to name each dropdown separately?

In other words, I want to avoid having to do this:

```
private void Form_Load(object sender, EventArgs e)
{
    comboBox1.BackColor = Color.Aqua;
    comboBox2.BackColor = Color.Aqua;
    comboBox3.BackColor = Color.Aqua;
    etc
    .
    .
    .
} 

```