diff --git a/src/vs/workbench/parts/debug/browser/media/debug.contribution.css b/src/vs/workbench/parts/debug/browser/media/debug.contribution.css
index de5b96b7d098e524240c9f1f57e768eac561f060..a080daf44fc2734a680673f6168c76be3253d4fb 100644
--- a/src/vs/workbench/parts/debug/browser/media/debug.contribution.css
+++ b/src/vs/workbench/parts/debug/browser/media/debug.contribution.css
@@ -17,7 +17,7 @@
 }
 
 .monaco-editor .debug-top-stack-frame-column {
-	background: rgba(255, 200, 0, 0.2);
+	background: rgba(255, 200, 0, 0.7);
 }
 
 .monaco-editor .debug-focused-stack-frame-line {
@@ -244,4 +244,8 @@
 .hc-black .monaco-editor .debug-top-stack-frame-line {
 	background: rgba(255, 246, 0, .87);
 	mix-blend-mode: lighten; /* Preserves text selection's contrast */
+}
+
+.hc-black .monaco-editor .debug-top-stack-frame-column {
+	outline: 2px solid #ff0000;
 }
\ No newline at end of file