diff --git a/dev/js/src/hint/alert.js b/dev/js/src/hint/alert.js
index f34fde8..768d719 100644
--- a/dev/js/src/hint/alert.js
+++ b/dev/js/src/hint/alert.js
@@ -11,20 +11,20 @@
       this._type = 'alert';
       this.active = false;
       this._element = document.createElement('div');
-      this._element.style.opacity = 0;
+      this._element.style.display = 'none';
       this._element.classList.add('alert', 'hint');
       return this;
     },
     show : function (msg) {
       this._element.textContent = msg;
       this.active = true;
-      this._element.style.opacity = 1;
+      this._element.style.display = 'block';
     },
 
     hide : function () {
       if (!this.active)
-	return false;
-      this._element.style.opacity = 0;
+	      return false;
+      this._element.style.display = 'none';
       this.active = false;
       return true;
     },
diff --git a/dev/scss/header/hint.scss b/dev/scss/header/hint.scss
index b916d5c..d5c6a4a 100644
--- a/dev/scss/header/hint.scss
+++ b/dev/scss/header/hint.scss
@@ -25,7 +25,8 @@
 
 div.alert.hint {
   position: absolute;
-  background-color: rgba(254,26,0,.9); // from alertify
+//  background-color: rgba(254,26,0,.9); // from alertify
+  background-color: rgb(254,26,0); // from alertify
   color: $nearly-white;
   padding: $item-padding;
   margin-top: 8px;
@@ -51,7 +52,7 @@
   border: {
     width: 0 8px 12px 0;
     style: solid;
-    color: rgba(254,26,0,.9) transparent; // from alertify
+    color: rgb(254,26,0) transparent; // from alertify
   }
 }
 
diff --git a/dev/scss/main/alertify/alertify-default.scss b/dev/scss/main/alertify/alertify-default.scss
index 7228a29..97a1232 100644
--- a/dev/scss/main/alertify/alertify-default.scss
+++ b/dev/scss/main/alertify/alertify-default.scss
@@ -65,7 +65,8 @@
 
 .alertify-log {
   background: #1F1F1F;
-  background: rgba(0,0,0,.9);
+//  background: rgba(0,0,0,.9);
+  background: rgb(0,0,0);
   padding: 15px;
   border-radius: 4px;
   color: #FFF;
@@ -73,9 +74,11 @@
 }
 .alertify-log-error {
   background: #FE1A00;
-  background: rgba(254,26,0,.9);
+  //  background: rgba(254,26,0,.9);
+    background: rgb(254,26,0);
 }
 .alertify-log-success {
   background: #5CB811;
-  background: rgba(92,184,17,.9);
+//  background: rgba(92,184,17,.9);
+  background: rgb(92,184,17);
 }
\ No newline at end of file