diff --git a/resources/ext.CodeMirror.WikiEditor.js b/resources/ext.CodeMirror.WikiEditor.js
index a5972219..0e3c29fb 100644
--- a/resources/ext.CodeMirror.WikiEditor.js
+++ b/resources/ext.CodeMirror.WikiEditor.js
@@ -237,6 +237,9 @@ function init() {
 				$codeMirror.addClass( 'cm-mw-colorblind-colors' );
 			}
 
+			// T365311: Apply color inversion until dark syntax styles are chosen
+			$codeMirror.addClass( 'notheme skin-invert' );
+
 			// T305333: Reload CodeMirror to fix a cursor caret issue.
 			codeMirror.refresh();