diff --git a/polygerrit-ui/app/styles/themes/app-theme.html b/polygerrit-ui/app/styles/themes/app-theme.html
index db49822bd1..b6b889f7b8 100644
--- a/polygerrit-ui/app/styles/themes/app-theme.html
+++ b/polygerrit-ui/app/styles/themes/app-theme.html
@@ -96,7 +96,7 @@ html {
   --line-height-h3: 1.714rem;     /* 24px */
   --line-height-h2: 2rem;         /* 28px */
   --line-height-h1: 2.286rem;     /* 32px */
-  --font-weight-normal: 400;
+  --font-weight-normal: 400; /* 400 is the same as 'normal' */
   --font-weight-bold: 500;
 
   /* spacing */
diff --git a/polygerrit-ui/app/styles/themes/dark-theme.html b/polygerrit-ui/app/styles/themes/dark-theme.html
index 56452cb3ef..83e1b4c28b 100644
--- a/polygerrit-ui/app/styles/themes/dark-theme.html
+++ b/polygerrit-ui/app/styles/themes/dark-theme.html
@@ -70,7 +70,7 @@ limitations under the License.
       --border-color: #5f6368;
 
       /* fonts */
-      --font-weight-bold: 900;
+      --font-weight-bold: 700; /* 700 is the same as 'bold' */
 
       /* spacing */