mjml-0.1.0.0: test/fixtures/mj-column-background-color.mjml

<mjml>
  <mj-body background-color="red">
    <mj-section background-color="orange">
      <mj-column background-color="red">
        <!-- Your first column -->
      </mj-column>
      <mj-column background-color="blue">
        <!-- Your second column -->
      </mj-column>
    </mj-section>
    <mj-section background-color="green">
      <mj-column>
        <!-- Your first column -->
      </mj-column>
      <mj-column>
        <!-- Your second column -->
      </mj-column>
      <mj-column>
        <!-- Your third column -->
      </mj-column>
    </mj-section>
  </mj-body>
</mjml>