small css color adjustment

Author: HB9HIL

index.html

@@ -87,6 +87,16 @@
 		border: 1px solid #727272;
 	}
 
+	.form-control:focus {
+		color: inherit;
+		background-color: #1c1c1c;
+	}
+
+	.form-control:disabled, .form-control[readonly] {
+    	background-color: #3e3e3e;
+		opacity: 1;
+	}
+
 	#buttonsRow {
 		position: fixed;
 		bottom: 8px;