changes active state color

scss/mixins/_buttons.scss

@@ -3,16 +3,16 @@
 // Easily pump out default styles, as well as :hover, :focus, :active,
 // and disabled options for all buttons
 
-@mixin button-variant($background, $border, $active-background: darken($background, 7.5%), $active-border: darken($border, 10%)) {
+@mixin button-variant($background, $border, $hover-background: darken($background, 7.5%), $hover-border: darken($border, 10%), $active-background: darken($background, 12.5%), $active-border: darken($border, 15%)) {
   @include color-yiq($background);
   background-color: $background;
   border-color: $border;
   @include box-shadow($btn-box-shadow);
 
   @include hover {
-    @include color-yiq($active-background);
-    background-color: $active-background;
-    border-color: $active-border;
+    @include color-yiq($hover-background);
+    background-color: $hover-background;
+    border-color: $hover-border;
   }
 
   &:focus,