diff --git a/core/frontend/helpers/comments.js b/core/frontend/helpers/comments.js
index 15628f1d3b..75142a0471 100644
--- a/core/frontend/helpers/comments.js
+++ b/core/frontend/helpers/comments.js
@@ -20,6 +20,11 @@ async function comments(options) {
         avatarSaturation = 50;
     }
 
+    let accentColor = '';
+    if (options.data.site.accent_color) {
+        accentColor = options.data.site.accent_color;
+    }
+
     const frontendKey = await getFrontendKey();
 
     const data = {
@@ -30,7 +35,8 @@ async function comments(options) {
         'post-id': this.id,
         'sentry-dsn': '', /* todo: insert sentry dsn key here */
         'color-scheme': colorScheme,
-        'avatar-saturation': avatarSaturation
+        'avatar-saturation': avatarSaturation,
+        'accent-color': accentColor
     };
 
     let dataAttributes = '';
diff --git a/test/unit/frontend/helpers/comments.test.js b/test/unit/frontend/helpers/comments.test.js
new file mode 100644
index 0000000000..ad0567223a
--- /dev/null
+++ b/test/unit/frontend/helpers/comments.test.js
@@ -0,0 +1,58 @@
+const should = require('should');
+const sinon = require('sinon');
+const configUtils = require('../../../utils/configUtils');
+const {mockManager} = require('../../../utils/e2e-framework');
+
+const comments = require('../../../../core/frontend/helpers/comments');
+const proxy = require('../../../../core/frontend/services/proxy');
+const {settingsCache} = proxy;
+
+describe('{{comments}} helper', function () {
+    let keyStub;
+
+    before(function () {
+        keyStub = sinon.stub().resolves('xyz');
+        const dataService = {
+            getFrontendKey: keyStub
+        };
+        proxy.init({dataService});
+    });
+
+    beforeEach(function () {
+        mockManager.mockMail();
+        mockManager.mockLabsEnabled('comments');
+        sinon.stub(settingsCache, 'get');
+    });
+
+    afterEach(function () {
+        mockManager.restore();
+        sinon.restore();
+        configUtils.restore();
+    });
+
+    it('returns undefined if not used withing post context', function (done) {
+        settingsCache.get.withArgs('members_enabled').returns(true);
+
+        comments({}).then(function (rendered) {
+            should.not.exist(rendered);
+            done();
+        }).catch(done);
+    });
+
+    it('returns a script tag', async function () {
+        settingsCache.get.withArgs('members_enabled').returns(true);
+
+        const rendered = await comments.call({
+            comment_id: 'post_test',
+            id: 'post_id_123'
+        }, {
+            hash: {},
+            data: {
+                site: {}
+            }
+        });
+        should.exist(rendered);
+        rendered.string.should.containEql('<script defer src="https://unpkg.com/@tryghost/comments-ui');
+        rendered.string.should.containEql('data-ghost-comments="http://127.0.0.1:2369/" data-api="http://127.0.0.1:2369/ghost/api/content/" data-admin="http://127.0.0.1:2369/ghost/" data-key="xyz" data-post-id="post_id_123" data-sentry-dsn="" data-color-scheme="auto" data-avatar-saturation="50" data-accent-color=""');
+    });
+});