Hi Suhaib,

You can simply define a computed field and then utilize that in decoration danger in list view.

Hi,

As far as I know you won't be able to change the color of the date field itself in odoo 11, but you can make the record/line red in the listview by adding the following to the tree view tag in the list view 

decoration-danger="x_doe >= (context_today() + relativedelta(days=-7)).strftime('%Y-%m-%d')"

Example below is what I tested on Odoo demo site for sales orders.

<tree string="Quotation" class="o_sale_order" multi_edit="1" sample="1" decoration-danger="create_date >= (context_today() + relativedelta(days=-7)).strftime('%Y-%m-%d')" >

Kind Regards,

you can take reference from the manufacturing orders tree view