diff --git a/style/themes/default-dark.css b/style/themes/default-dark.css
index e2c141ca2..5ad4c2b43 100644
--- a/style/themes/default-dark.css
+++ b/style/themes/default-dark.css
@@ -25,6 +25,9 @@ body {
 h4 {
   color: #44def1;
 }
+.callout h4 {
+  color: inherit;
+}
 .content-header > .breadcrumb > li > a {
   color: #bec5cb;
 }
diff --git a/style/themes/high-contrast-dark.css b/style/themes/high-contrast-dark.css
index 640ab76c0..64ed35167 100644
--- a/style/themes/high-contrast-dark.css
+++ b/style/themes/high-contrast-dark.css
@@ -64,6 +64,9 @@ a:active {
 h4 {
   color: #44def1;
 }
+.callout h4 {
+  color: inherit;
+}
 
 .page-header {
   border-color: #202830;