select fixes

src/scss/_variables.scss

@@ -82,7 +82,7 @@ $text-muted-light-opacity: .4 !default;
 $text-muted-dark-opacity: .8 !default;
 
 $border-opacity: .16 !default;
-$border-dark-opacity: .32 !default;
+$border-dark-opacity: .24 !default;
 
 $light: #f4f6fa !default;
 $dark: #232e3c !default;
@@ -509,7 +509,8 @@ $list-group-action-color: inherit !default;
 $list-group-bg: inherit !default;
 
 $input-disabled-bg: $gray-100 !default;
-$input-border-color: $border-color-dark-transparent !default;
+$input-border-color: $border-color-dark !default;
+$input-border-color-transparent: $border-color-dark-transparent !default;
 $input-placeholder-color: $text-muted-light !default;
 
 $input-group-addon-bg: $light !default;
@@ -523,7 +524,7 @@ $form-check-margin-bottom: .5rem !default;
 $form-check-input-width: 1rem !default;
 $form-check-padding-start: $form-check-input-width + .5rem !default;
 $form-check-input-bg: $white !default;
-$form-check-input-border: 1px solid $border-color-dark-transparent !default;
+$form-check-input-border: 1px solid $input-border-color-transparent !default;
 $form-check-input-border-radius: $border-radius !default;
 $form-check-input-checked-bg-size: 1rem !default;
 
@@ -533,7 +534,7 @@ $form-check-input-checked-bg-image: url("data:image/svg+xml,<svg xmlns='http://w
 $form-check-input-checked-bg-image-dark: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' width='16' height='16'><path fill='none' stroke='#{$dark}' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M4 8.5l2.5 2.5l5.5 -5.5'/></svg>") !default;
 $form-check-radio-checked-bg-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><circle r='3' fill='#{$form-check-input-checked-color}' cx='8' cy='8' /></svg>") !default;
 
-$form-check-input-checked-border-color: $border-color-dark-transparent !default;
+$form-check-input-checked-border-color: $input-border-color-transparent !default;
 
 $form-check-label-disabled-opacity: $text-muted-opacity;
 

src/scss/ui/forms/_form-icon.scss

@@ -4,11 +4,13 @@ Icon input
 .input-icon {
   position: relative;
 
-  .form-control:not(:last-child) {
+  .form-control:not(:last-child),
+  .form-select:not(:last-child) {
     padding-right: 2.5rem;
   }
 
-  .form-control:not(:first-child) {
+  .form-control:not(:first-child),
+  .form-select:not(:last-child) {
     padding-left: 2.5rem;
   }
 }

src/scss/ui/forms/_validation.scss

 %validation-lite {
-  border-color: $border-color;
+  border-color: $input-border-color;
 }
 
 @each $state, $data in $form-validation-states {