MAGETWO-39422: [UI] Assistance with applying new style for Credit card validation

Author: zanilee

app/design/frontend/Magento/blank/Magento_Checkout/web/css/source/module/checkout/_payment-options.less

@@ -92,8 +92,8 @@
                 -webkit-filter: grayscale(100%); // For Webkit browsers
                 -webkit-transition: all .6s ease; // Fade to color for Chrome and Safari
                 filter: grayscale(100%);
-                filter: gray; // For IE 6 - 9
                 filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix type=\'matrix\' values=\'0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale"); // Firefox 10+, Firefox on Android
+                filter: gray; // For IE 6 - 9
             }
         }
     }