diff --git a/templates/field/field--node--extra-field-oe-theme-content-organisation-teaser-details.html.twig b/templates/field/field--node--extra-field-oe-theme-content-organisation-teaser-details.html.twig
index c2ede84d3..3b300600f 100644
--- a/templates/field/field--node--extra-field-oe-theme-content-organisation-teaser-details.html.twig
+++ b/templates/field/field--node--extra-field-oe-theme-content-organisation-teaser-details.html.twig
@@ -6,6 +6,9 @@
 #}
 {% for item in items %}
   {% if item.content|render|striptags|trim is not empty %}
-    <div{{ not loop.last ? ' class="ecl-u-border-bottom ecl-u-border-color-grey-15 ecl-u-mb-m ecl-u-pb-m"'}}>{{ item.content }}</div>
+  <div{% if not loop.last %}
+    class="ecl-u-border-bottom {{ ecl_class_border_color() }} ecl-u-mb-m ecl-u-pb-m"{% endif %}>
+    {{ item.content }}
+  </div>
   {% endif %}
 {% endfor %}
diff --git a/templates/patterns/organisation_teaser/pattern-organisation-teaser.html.twig b/templates/patterns/organisation_teaser/pattern-organisation-teaser.html.twig
index d5af097a3..9c3bffa6a 100644
--- a/templates/patterns/organisation_teaser/pattern-organisation-teaser.html.twig
+++ b/templates/patterns/organisation_teaser/pattern-organisation-teaser.html.twig
@@ -14,7 +14,7 @@
  */
 #}
 
-<article class="ecl-u-mb-l ecl-u-border-bottom ecl-u-border-width-3 ecl-u-border-color-grey-15 ecl-content-item ecl-u-d-flex ecl-u-pb-m">
+<article class="ecl-u-mb-l ecl-u-border-bottom ecl-u-border-width-3 {{ ecl_class_border_color() }} ecl-content-item ecl-u-d-flex ecl-u-pb-m">
   {% if logo is not empty %}
     <div role="img"
       aria-label="{{ logo.alt }}"
@@ -22,7 +22,7 @@
       style="background-image: url('{{ logo.src }}');"></div>
   {% endif %}
 
-  <div class="ecl-u-flex-grow-1 ecl-u-type-color-grey">
+  <div class="ecl-u-flex-grow-1 ecl-u-type-color-dark">
     <h4 class="ecl-u-type-heading-4 ecl-u-mb-s ecl-u-mt-none">
       {{ name }}{% if acronym is not empty %} ({{ acronym }}){% endif %}
     </h4>
diff --git a/tests/src/Functional/ContentOrganisationRenderTest.php b/tests/src/Functional/ContentOrganisationRenderTest.php
index 7a289c89e..957707234 100644
--- a/tests/src/Functional/ContentOrganisationRenderTest.php
+++ b/tests/src/Functional/ContentOrganisationRenderTest.php
@@ -53,7 +53,6 @@ protected function setUp(): void {
    * Tests that the Organisation page renders correctly.
    */
   public function testOrganisationRendering(): void {
-    $this->markTestSkipped('Must be re-enabled before considering migration to ECL 4 as complete.');
     $file = \Drupal::service('file.repository')->writeData(file_get_contents(\Drupal::service('extension.list.theme')->getPath('oe_theme') . '/tests/fixtures/example_1.jpeg'), 'public://example_1.jpeg');
     $file->setPermanent();
     $file->save();
@@ -91,7 +90,7 @@ public function testOrganisationRendering(): void {
     $this->drupalGet($node->toUrl());
 
     // Assert page header - metadata.
-    $page_header = $this->assertSession()->elementExists('css', '.ecl-page-header.ecl-page-header--negative');
+    $page_header = $this->assertSession()->elementExists('css', '.ecl-page-header');
     $assert = new PatternPageHeaderAssert();
     $expected_values = [
       'title' => 'My node title',
@@ -235,7 +234,7 @@ public function testOrganisationRendering(): void {
     // Assert Leadership and organisation region is rendered.
     $this->assertContentHeader($content_items[2], 'Leadership and organisation', 'leadership-and-organisation');
     // Assert staff search link values.
-    $staff_search_link = $content_items[2]->findAll('css', 'a.ecl-link.ecl-link--standalone.ecl-link--icon.ecl-link--icon-after');
+    $staff_search_link = $content_items[2]->findAll('css', 'a.ecl-link.ecl-link--standalone.ecl-link--icon');
     $this->assertCount(1, $staff_search_link);
     $this->assertEquals('Search for staff', $staff_search_link[0]->find('css', '.ecl-link__label')->getText());
     $staff_search_link[0]->hasLink('https://example.com');
@@ -269,7 +268,7 @@ public function testOrganisationRendering(): void {
     $this->drupalGet($node->toUrl());
 
     $content_items = $content->findAll('xpath', '/div');
-    $person_content = $content_items[2]->findAll('css', 'article.ecl-u-d-flex.ecl-u-pv-m.ecl-u-border-bottom.ecl-u-border-color-grey-15');
+    $person_content = $content_items[2]->findAll('css', 'article.ecl-u-d-flex.ecl-u-pv-m.ecl-u-border-bottom.ecl-u-border-color-neutral-40');
     $this->assertCount(1, $person_content);
     $this->assertStringContainsString('node/2', $person_content[0]->find('css', 'a.ecl-link.ecl-link--standalone')->getAttribute('href'));
     // Assert person content.
@@ -288,8 +287,8 @@ public function testOrganisationRendering(): void {
     $person->set('oe_person_jobs', [$person_job_1, $person_job_2]);
     $person->save();
     $this->getSession()->reload();
-    $person_content = $content_items[2]->findAll('css', 'article.ecl-u-d-flex.ecl-u-pv-m.ecl-u-border-bottom.ecl-u-border-color-grey-15');
-    $this->assertEquals('Adviser, Chief Adviser', $person_content[0]->find('css', '.ecl-content-item__meta.ecl-u-type-s.ecl-u-type-color-grey-75.ecl-u-mb-xs')->getText());
+    $person_content = $content_items[2]->findAll('css', 'article.ecl-u-d-flex.ecl-u-pv-m.ecl-u-border-bottom.ecl-u-border-color-neutral-40');
+    $this->assertEquals('Adviser, Chief Adviser', $person_content[0]->find('css', '.ecl-content-item__meta.ecl-u-type-s.ecl-u-type-color-dark-100.ecl-u-mb-xs')->getText());
   }
 
 }
diff --git a/tests/src/Kernel/OrganisationRenderTest.php b/tests/src/Kernel/OrganisationRenderTest.php
index 6685a42b8..7c3e8717f 100644
--- a/tests/src/Kernel/OrganisationRenderTest.php
+++ b/tests/src/Kernel/OrganisationRenderTest.php
@@ -73,7 +73,6 @@ protected function setUp(): void {
    * Test a organisation being rendered as a teaser.
    */
   public function testOrganisationTeaser(): void {
-    $this->markTestSkipped('Must be re-enabled before considering migration to ECL 4 as complete.');
     $logo_media = $this->createMediaImage('organisation_logo');
     $first_contact = $this->createContactEntity('first_contact', 'oe_general');