You can use the Databound event of the Dropdownlist for changing the color of the item.
Try something like
protected void DropDownList1_DataBound(object sender, EventArgs e)
{
foreach (ListItem item in DropDownList1.Items)
{
if (string.Compare(item.Text, "Telugu",true)==0)
{
item.Attributes.Add("style", "background-color:#110001");
item.Selected = false;
}
}
}
Hope this helps...