Change color of only the first row in QML/Qt TableView

I am using TableView of QtQuick.Controls 1.4
This is the rowDelegate. I want to have just the first row of blue colour and rest of the rows (empty or non-empty) of green color.

Code:

rowDelegate:  
           Rectangle
           {
                border.width: 1
                height: 50
                width: 2000
 
                color: {
                         var item = mymodel.get( styleData.row )
 
                         if (item.index1 === "1")
                             return "blue"
 
                         return "green"
 
                     }
             }

Now, my problem is that this code does colour the first row as blue but it also colours the empty rows as blue.

What is the way to solve this problem?

Attachment 13582