diff --git a/src/_debug-children.css b/src/_debug-children.css
index 1e0a965..10204da 100644
--- a/src/_debug-children.css
+++ b/src/_debug-children.css
@@ -9,4 +9,6 @@
 */
 
 .debug * { outline: 1px solid gold; }
+.debug-white * { outline: 1px solid white; }
+.debug-black * { outline: 1px solid black; }