add $btn-default-bgcolor variable

resource/styles/agile-admin/inverse/colors/default-dark.scss

@@ -22,6 +22,7 @@ $dark: darken($bodytext, 5%);
 $border: lighten($basecolor, 15%);
 $navbar-border: lighten($border, 10%);
 $active-navbar-border: darken($border, 3%);
+$btn-default-bgcolor: darken($basecolor, 10%);
 
 @import 'apply-colors';
 @import 'apply-colors-dark';

resource/styles/agile-admin/inverse/eliteadmin.scss

@@ -1140,7 +1140,7 @@ label{
 }
 .btn-default, .btn-default.disabled{
   color: $bodytext;
-  $this-color: darken($bodycolor, 10%);
+  $this-color: $btn-default-bgcolor;
   background: $this-color;
   border:1px solid $this-color;
    &:hover, &:focus, &.focus{
@@ -1155,7 +1155,7 @@ label{
 .btn-default.btn-outline {
     background-color: transparent;
     &:hover, &:focus, &.focus{
-    background:darken($bodycolor, 10%);
+    background: $btn-default-bgcolor;
     }
 }
 .btn-primary.btn-outline {

resource/styles/agile-admin/inverse/variables.scss

@@ -53,6 +53,7 @@ $lft:left !default;
 $dark-text:#848a96 !default;
 $navbar-border: #ccc !default;
 $active-navbar-border: lighten($navbar-border, 20%) !default;
+$btn-default-bgcolor: darken(#fff, 10%) !default;
 
 /*Border radius*/
 $radius: 0 !default;

resource/styles/scss/_override-bootstrap-variables.scss

@@ -41,6 +41,13 @@ $border-radius-large: 0;
 $border-radius-small: 0;
 
 
+//== Buttons
+//
+//## For each of Bootstrap's buttons, define text, background and border color.
+
+$btn-default-bg: $btn-default-bgcolor;
+
+
 
 //== Forms
 //
@@ -49,7 +56,7 @@ $border-radius-small: 0;
 //** `<input>` background color
 $input-bg:                       $bodycolor;
 //** `<input disabled>` background color
-$input-bg-disabled:              darken($bodycolor, 10%);
+$input-bg-disabled:              $btn-default-bgcolor;
 
 //** `<input>` border color
 $input-border:                   $border;