diff --git a/docs/assets/css/bootstrap.css b/docs/assets/css/bootstrap.css
index 50687ac2a3..f1c32d97db 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -1745,6 +1745,19 @@ input[type="button"].btn-block {
   border-color: #8d9091;
 }
 
+.btn.disabled:hover,
+.btn[disabled]:hover,
+fieldset[disabled] .btn:hover,
+.btn.disabled:focus,
+.btn[disabled]:focus,
+fieldset[disabled] .btn:focus,
+.btn.disabled:active,
+.btn[disabled]:active,
+fieldset[disabled] .btn:active {
+  background-color: #a7a9aa;
+  border-color: #a7a9aa;
+}
+
 .btn-primary {
   background-color: #428bca;
   border-color: #428bca;
@@ -1757,6 +1770,19 @@ input[type="button"].btn-block {
   border-color: #3071a9;
 }
 
+.btn-primary.disabled:hover,
+.btn-primary[disabled]:hover,
+fieldset[disabled] .btn-primary:hover,
+.btn-primary.disabled:focus,
+.btn-primary[disabled]:focus,
+fieldset[disabled] .btn-primary:focus,
+.btn-primary.disabled:active,
+.btn-primary[disabled]:active,
+fieldset[disabled] .btn-primary:active {
+  background-color: #428bca;
+  border-color: #428bca;
+}
+
 .btn-warning {
   background-color: #f0ad4e;
   border-color: #f0ad4e;
@@ -1769,6 +1795,19 @@ input[type="button"].btn-block {
   border-color: #ec971f;
 }
 
+.btn-warning.disabled:hover,
+.btn-warning[disabled]:hover,
+fieldset[disabled] .btn-warning:hover,
+.btn-warning.disabled:focus,
+.btn-warning[disabled]:focus,
+fieldset[disabled] .btn-warning:focus,
+.btn-warning.disabled:active,
+.btn-warning[disabled]:active,
+fieldset[disabled] .btn-warning:active {
+  background-color: #f0ad4e;
+  border-color: #f0ad4e;
+}
+
 .btn-danger {
   background-color: #d9534f;
   border-color: #d9534f;
@@ -1781,6 +1820,19 @@ input[type="button"].btn-block {
   border-color: #c9302c;
 }
 
+.btn-danger.disabled:hover,
+.btn-danger[disabled]:hover,
+fieldset[disabled] .btn-danger:hover,
+.btn-danger.disabled:focus,
+.btn-danger[disabled]:focus,
+fieldset[disabled] .btn-danger:focus,
+.btn-danger.disabled:active,
+.btn-danger[disabled]:active,
+fieldset[disabled] .btn-danger:active {
+  background-color: #d9534f;
+  border-color: #d9534f;
+}
+
 .btn-success {
   background-color: #5cb85c;
   border-color: #5cb85c;
@@ -1793,6 +1845,19 @@ input[type="button"].btn-block {
   border-color: #449d44;
 }
 
+.btn-success.disabled:hover,
+.btn-success[disabled]:hover,
+fieldset[disabled] .btn-success:hover,
+.btn-success.disabled:focus,
+.btn-success[disabled]:focus,
+fieldset[disabled] .btn-success:focus,
+.btn-success.disabled:active,
+.btn-success[disabled]:active,
+fieldset[disabled] .btn-success:active {
+  background-color: #5cb85c;
+  border-color: #5cb85c;
+}
+
 .btn-info {
   background-color: #5bc0de;
   border-color: #5bc0de;
@@ -1805,6 +1870,19 @@ input[type="button"].btn-block {
   border-color: #31b0d5;
 }
 
+.btn-info.disabled:hover,
+.btn-info[disabled]:hover,
+fieldset[disabled] .btn-info:hover,
+.btn-info.disabled:focus,
+.btn-info[disabled]:focus,
+fieldset[disabled] .btn-info:focus,
+.btn-info.disabled:active,
+.btn-info[disabled]:active,
+fieldset[disabled] .btn-info:active {
+  background-color: #5bc0de;
+  border-color: #5bc0de;
+}
+
 .btn-link,
 .btn-link:active,
 .btn-link[disabled],
diff --git a/less/buttons.less b/less/buttons.less
index 80d19494dd..143ab42fd2 100644
--- a/less/buttons.less
+++ b/less/buttons.less
@@ -109,7 +109,26 @@ input[type="button"] {
   }
 }
 
+// Mixin for darkening only enabled buttons for link states
+.darken-button-states (@background, @border) {
+  &:hover,
+  &:focus,
+  &:active {
+    background-color: darken(@background, 5%);
+        border-color: darken(@border, 10%);
+  }
 
+  &.disabled,
+  &[disabled],
+  fieldset[disabled] & {
+    &:hover,
+    &:focus,
+    &:active {
+      background-color: @background;
+          border-color: @border
+    }
+  }
+}
 
 // Alternate buttons
 // --------------------------------------------------
@@ -117,67 +136,37 @@ input[type="button"] {
 .btn {
   color: @btn-color;
   background-color: @btn-background;
-  border-color: @btn-border;
-  &:hover,
-  &:focus,
-  &:active {
-    background-color: darken(@btn-background, 5%);
-        border-color: darken(@btn-border, 10%);
-  }
+      border-color: @btn-border;
+  .darken-button-states(@btn-background, @btn-border)
 }
 .btn-primary {
   background-color: @btn-background-primary;
       border-color: @btn-border-primary;
-  &:hover,
-  &:focus,
-  &:active {
-    background-color: darken(@btn-background-primary, 5%);
-        border-color: darken(@btn-border-primary, 10%);
-  }
+  .darken-button-states(@btn-background-primary, @btn-border-primary)
 }
-// Warning appears are orange
+// Warning appears as orange
 .btn-warning {
   background-color: @btn-background-warning;
       border-color: @btn-border-warning;
-  &:hover,
-  &:focus,
-  &:active {
-    background-color: darken(@btn-background-warning, 5%);
-        border-color: darken(@btn-border-warning, 10%);
-  }
+  .darken-button-states(@btn-background-warning, @btn-border-warning)
 }
 // Danger and error appear as red
 .btn-danger {
   background-color: @btn-background-danger;
       border-color: @btn-border-danger;
-  &:hover,
-  &:focus,
-  &:active {
-    background-color: darken(@btn-background-danger, 5%);
-        border-color: darken(@btn-border-danger, 10%);
-  }
+  .darken-button-states(@btn-background-danger, @btn-border-danger)
 }
 // Success appears as green
 .btn-success {
   background-color: @btn-background-success;
       border-color: @btn-border-success;
-  &:hover,
-  &:focus,
-  &:active {
-    background-color: darken(@btn-background-success, 5%);
-        border-color: darken(@btn-border-success, 10%);
-  }
+  .darken-button-states(@btn-background-success, @btn-border-success)
 }
 // Info appears as blue-green
 .btn-info {
   background-color: @btn-background-info;
       border-color: @btn-border-info;
-  &:hover,
-  &:focus,
-  &:active {
-    background-color: darken(@btn-background-info, 5%);
-        border-color: darken(@btn-border-info, 10%);
-  }
+  .darken-button-states(@btn-background-info, @btn-border-info)
 }