To achieve the desired background color for specific table rows within a `foreach` loop in Odoo templates, you can use conditional statements and CSS classes. Here's an example of how you can modify your code to accomplish this:

In this example, we've introduced a new variable called `row_number` before the `foreach` loop. We set its initial value to `1`. Inside the loop, we assign the class `row-{{ row_number }}` to each `tr` element. Finally, after the loop, we increment `row_number` by `1` to prepare it for the next row.

Now, you can define CSS rules for the specific row classes in your Odoo theme's CSS file. For example:

tr.row-1,
tr.row-4,
tr.row-6,
tr.row-7 {
  background-color: red;
}

In this CSS code, we target the `tr` elements with the classes `row-1`, `row-4`, `row-6`, and `row-7`, and set their background color to red.

By combining the conditional statement and CSS classes, you can dynamically apply the desired background color to the specific rows based on their position in the loop.

Hello Asmaa,

Instead of variable, you can do it with css easily. 

Please find code in comment. 

Hope it will be helpful to you.

Thanks & Regards,
Email: odoo@aktivsoftware.com
Skype: kalpeshmaheshwari

Hi,

Try like below.

<t t-set="variable_name" t-value="initial_value"/>

    <tbody>

         <tr t-foreach="attendance_ids" t-as="attendance" class="text-center">

            <td><span t-esc="attendance['employee_name']"/></td>

            <td><span t-esc="attendance['employee_department']"/></td>

             <td><span t-esc="attendance['attendance_days']"/></td>

             <t t-set="variable_name" t-value="updated_value"/>

        </tr>

    </tbody>

Regards