To change the line background color in the list view in Odoo, you can use the XML or CSS customization. Odoo allows for dynamic styling based on conditions using the

 t-att-class

attribute within the view's XML file. You can apply conditional formatting to change the row background color depending on certain conditions (e.g., status or value). Alternatively, you can also add custom CSS rules if you want a static color for all rows in a list view.