diff --git a/src/Monaco/index.html b/src/Monaco/index.html
index 54f7524225bf..fd17ceab5755 100644
--- a/src/Monaco/index.html
+++ b/src/Monaco/index.html
@@ -71,6 +71,18 @@
             /*Hides alert box */
             display: none !important
         }
+
+        /* Fix for text selection in High Contrast Mode */
+        @media (forced-colors: active) {
+            .monaco-editor .focused .selected-text {
+                background-color: Highlight !important;
+                color: HighlightText !important;
+            }
+            .monaco-editor .selected-text {
+                background-color: Highlight !important;
+                color: HighlightText !important;
+            }
+        }
     </style>
 </head>
 
diff --git a/src/modules/registrypreview/RegistryPreviewUILib/Assets/RegistryPreview/index.html b/src/modules/registrypreview/RegistryPreviewUILib/Assets/RegistryPreview/index.html
index 95ae2d3d4e79..76b8157f5c55 100644
--- a/src/modules/registrypreview/RegistryPreviewUILib/Assets/RegistryPreview/index.html
+++ b/src/modules/registrypreview/RegistryPreviewUILib/Assets/RegistryPreview/index.html
@@ -26,6 +26,18 @@
 			/*Hides alert box */
 			display: none !important
 		}
+
+		/* Fix for text selection in High Contrast Mode */
+		@media (forced-colors: active) {
+			.monaco-editor .focused .selected-text {
+				background-color: Highlight !important;
+				color: HighlightText !important;
+			}
+			.monaco-editor .selected-text {
+				background-color: Highlight !important;
+				color: HighlightText !important;
+			}
+		}
 	</style>
 </head>