diff --git a/novelwriter/core/tohtml.py b/novelwriter/core/tohtml.py
index fad2bc3b..8e1a67ca 100644
--- a/novelwriter/core/tohtml.py
+++ b/novelwriter/core/tohtml.py
@@ -368,13 +368,12 @@ class ToHtml(Tokenizer):
 
     def getStyleSheet(self) -> list[str]:
         """Generate a stylesheet for the current settings."""
-        styles = []
         if not self._cssStyles:
-            return styles
+            return []
 
         mScale = self._lineHeight/1.15
-        textAlign = "justify" if self._doJustify else "left"
 
+        styles = []
         styles.append("body {{font-family: '{0:s}'; font-size: {1:d}pt;}}".format(
             self._textFont, self._textSize
         ))
@@ -384,7 +383,7 @@ class ToHtml(Tokenizer):
             "margin-top: {2:.2f}em; margin-bottom: {3:.2f}em;"
             "}}"
         ).format(
-            textAlign,
+            "justify" if self._doJustify else "left",
             round(100 * self._lineHeight),
             mScale * self._marginText[0],
             mScale * self._marginText[1],
@@ -449,6 +448,7 @@ class ToHtml(Tokenizer):
         ))
 
         styles.append("a {color: rgb(66, 113, 174);}")
+        styles.append("mark {background: rgb(255, 255, 166);}")
         styles.append(".tags {color: rgb(245, 135, 31); font-weight: bold;}")
         styles.append(".break {text-align: left;}")
         styles.append(".synopsis {font-style: italic;}")
diff --git a/novelwriter/tools/manuscript.py b/novelwriter/tools/manuscript.py
index 8d95da6a..178e39c7 100644
--- a/novelwriter/tools/manuscript.py
+++ b/novelwriter/tools/manuscript.py
@@ -756,20 +756,13 @@ class _PreviewWidget(QTextBrowser):
         self.buildProgress.setCentreText(self.tr("Processing ..."))
         qApp.processEvents()
 
-        styles = "\n".join(data.get("styles", [
-            "h1, h2 {color: rgb(66, 113, 174);}",
-            "h3, h4 {color: rgb(50, 50, 50);}",
-            "a {color: rgb(66, 113, 174);}",
-            ".tags {color: rgb(245, 135, 31); font-weight: bold;}",
-        ]))
+        styles = "\n".join(data.get("styles", []))
         self.document().setDefaultStyleSheet(styles)
 
         html = "".join(data.get("html", []))
         html = html.replace("\t", "!!tab!!")
         html = html.replace("<del>", "<span style='text-decoration: line-through;'>")
         html = html.replace("</del>", "</span>")
-        html = html.replace("<mark>", "<span style='background-color: #ffffa6;'>")
-        html = html.replace("</mark>", "</span>")
         self.setHtml(html)
         qApp.processEvents()
         while self.find("!!tab!!"):
diff --git a/tests/reference/mBuildDocBuild_HTML5_Lorem_Ipsum.htm b/tests/reference/mBuildDocBuild_HTML5_Lorem_Ipsum.htm
index f3463792..f0aa4a92 100644
--- a/tests/reference/mBuildDocBuild_HTML5_Lorem_Ipsum.htm
+++ b/tests/reference/mBuildDocBuild_HTML5_Lorem_Ipsum.htm
@@ -14,6 +14,7 @@ h4 {color: rgb(50, 50, 50); page-break-after: avoid; margin-top: 0.76em; margin-
 .title {font-size: 2.5em; margin-top: 1.30em; margin-bottom: 0.65em;}
 .sep, .skip {text-align: center; margin-top: 1.30em; margin-bottom: 1.30em;}
 a {color: rgb(66, 113, 174);}
+mark {background: rgb(255, 255, 166);}
 .tags {color: rgb(245, 135, 31); font-weight: bold;}
 .break {text-align: left;}
 .synopsis {font-style: italic;}
diff --git a/tests/reference/mBuildDocBuild_HTML5_Lorem_Ipsum.json b/tests/reference/mBuildDocBuild_HTML5_Lorem_Ipsum.json
index 50ae4237..6ff35e85 100644
--- a/tests/reference/mBuildDocBuild_HTML5_Lorem_Ipsum.json
+++ b/tests/reference/mBuildDocBuild_HTML5_Lorem_Ipsum.json
@@ -2,8 +2,8 @@
   "meta": {
     "projectName": "Lorem Ipsum",
     "novelAuthor": "lipsum.com",
-    "buildTime": 1706648755,
-    "buildTimeStr": "2024-01-30 22:05:55"
+    "buildTime": 1709024252,
+    "buildTimeStr": "2024-02-27 09:57:32"
   },
   "text": {
     "css": [
@@ -16,6 +16,7 @@
       ".title {font-size: 2.5em; margin-top: 1.30em; margin-bottom: 0.65em;}",
       ".sep, .skip {text-align: center; margin-top: 1.30em; margin-bottom: 1.30em;}",
       "a {color: rgb(66, 113, 174);}",
+      "mark {background: rgb(255, 255, 166);}",
       ".tags {color: rgb(245, 135, 31); font-weight: bold;}",
       ".break {text-align: left;}",
       ".synopsis {font-style: italic;}",