small style fix

examples/examples-browser/views/colors.html

@@ -51,6 +51,9 @@
     .sw_sm.matched {
         border: 1px solid #000;
     }
+        .d-flex {
+            margin: 2px 4px;
+        }
     .sw_sm {
         width: 10px;
         height: 10px;