diff --git a/lib/generators/simple_form/templates/config/initializers/simple_form.rb b/lib/generators/simple_form/templates/config/initializers/simple_form.rb
index 2bde7db9..2cb8881d 100644
--- a/lib/generators/simple_form/templates/config/initializers/simple_form.rb
+++ b/lib/generators/simple_form/templates/config/initializers/simple_form.rb
@@ -14,7 +14,7 @@ SimpleForm.setup do |config|
   # stack. The options given below are used to wrap the
   # whole input.
   config.wrappers :default, class: :input,
-    hint_class: :field_with_hint, error_class: :field_with_errors do |b|
+    hint_class: :field_with_hint, error_class: :field_with_errors, valid_class: :field_without_errors do |b|
     ## Extensions enabled by default
     # Any of these extensions can be disabled for a
     # given input by passing: `f.input EXTENSION_NAME => false`.
diff --git a/lib/generators/simple_form/templates/config/initializers/simple_form_bootstrap.rb b/lib/generators/simple_form/templates/config/initializers/simple_form_bootstrap.rb
index dd27b205..3d09d66c 100644
--- a/lib/generators/simple_form/templates/config/initializers/simple_form_bootstrap.rb
+++ b/lib/generators/simple_form/templates/config/initializers/simple_form_bootstrap.rb
@@ -12,7 +12,7 @@ SimpleForm.setup do |config|
   config.button_class = 'btn btn-default'
   config.boolean_label_class = nil
 
-  config.wrappers :vertical_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :vertical_form, tag: 'div', class: 'form-group', error_class: 'has-error', valid_class: 'no-error' do |b|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
@@ -27,7 +27,7 @@ SimpleForm.setup do |config|
     b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
   end
 
-  config.wrappers :vertical_file_input, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :vertical_file_input, tag: 'div', class: 'form-group', error_class: 'has-error', valid_class: 'no-error' do |b|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
@@ -40,7 +40,7 @@ SimpleForm.setup do |config|
     b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
   end
 
-  config.wrappers :vertical_boolean, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :vertical_boolean, tag: 'div', class: 'form-group', error_class: 'has-error', valid_class: 'no-error' do |b|
     b.use :html5
     b.optional :readonly
 
@@ -52,7 +52,7 @@ SimpleForm.setup do |config|
     b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
   end
 
-  config.wrappers :vertical_radio_and_checkboxes, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :vertical_radio_and_checkboxes, tag: 'div', class: 'form-group', error_class: 'has-error', valid_class: 'no-error' do |b|
     b.use :html5
     b.optional :readonly
     b.use :label, class: 'control-label'
@@ -61,7 +61,7 @@ SimpleForm.setup do |config|
     b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
   end
 
-  config.wrappers :horizontal_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :horizontal_form, tag: 'div', class: 'form-group', error_class: 'has-error', valid_class: 'no-error' do |b|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
@@ -78,7 +78,7 @@ SimpleForm.setup do |config|
     end
   end
 
-  config.wrappers :horizontal_file_input, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :horizontal_file_input, tag: 'div', class: 'form-group', error_class: 'has-error', valid_class: 'no-error' do |b|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
@@ -93,7 +93,7 @@ SimpleForm.setup do |config|
     end
   end
 
-  config.wrappers :horizontal_boolean, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :horizontal_boolean, tag: 'div', class: 'form-group', error_class: 'has-error', valid_class: 'no-error' do |b|
     b.use :html5
     b.optional :readonly
 
@@ -107,7 +107,7 @@ SimpleForm.setup do |config|
     end
   end
 
-  config.wrappers :horizontal_radio_and_checkboxes, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :horizontal_radio_and_checkboxes, tag: 'div', class: 'form-group', error_class: 'has-error', valid_class: 'no-error' do |b|
     b.use :html5
     b.optional :readonly
 
@@ -120,7 +120,7 @@ SimpleForm.setup do |config|
     end
   end
 
-  config.wrappers :inline_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :inline_form, tag: 'div', class: 'form-group', error_class: 'has-error', valid_class: 'no-error' do |b|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
@@ -135,7 +135,7 @@ SimpleForm.setup do |config|
     b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
   end
 
-  config.wrappers :multi_select, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
+  config.wrappers :multi_select, tag: 'div', class: 'form-group', error_class: 'has-error', valid_class: 'no-error' do |b|
     b.use :html5
     b.optional :readonly
     b.use :label, class: 'control-label'
diff --git a/lib/generators/simple_form/templates/config/initializers/simple_form_foundation.rb b/lib/generators/simple_form/templates/config/initializers/simple_form_foundation.rb
index d4314c73..2515877e 100644
--- a/lib/generators/simple_form/templates/config/initializers/simple_form_foundation.rb
+++ b/lib/generators/simple_form/templates/config/initializers/simple_form_foundation.rb
@@ -15,7 +15,7 @@ SimpleForm.setup do |config|
   # doesn't provide styles for hints. You will need to provide your own CSS styles for hints.
   # Uncomment them to enable hints.
 
-  config.wrappers :vertical_form, class: :input, hint_class: :field_with_hint, error_class: :error do |b|
+  config.wrappers :vertical_form, class: :input, hint_class: :field_with_hint, error_class: :error, valid_class: :valid do |b|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
@@ -29,7 +29,7 @@ SimpleForm.setup do |config|
     # b.use :hint,  wrap_with: { tag: :span, class: :hint }
   end
 
-  config.wrappers :horizontal_form, tag: 'div', class: 'row', hint_class: :field_with_hint, error_class: :error do |b|
+  config.wrappers :horizontal_form, tag: 'div', class: 'row', hint_class: :field_with_hint, error_class: :error, valid_class: :valid do |b|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
@@ -71,7 +71,7 @@ SimpleForm.setup do |config|
   # Note that you need to adapt this wrapper to your needs. If you need a 4
   # columns form then change the wrapper class to 'small-3', if you need
   # only two use 'small-6' and so on.
-  config.wrappers :inline_form, tag: 'div', class: 'column small-4', hint_class: :field_with_hint, error_class: :error do |b|
+  config.wrappers :inline_form, tag: 'div', class: 'column small-4', hint_class: :field_with_hint, error_class: :error, valid_class: :valid do |b|
     b.use :html5
     b.use :placeholder
     b.optional :maxlength
@@ -90,7 +90,7 @@ SimpleForm.setup do |config|
   # Examples of use:
   # - wrapper_html: {class: 'row'}, custom_wrapper_html: {class: 'column small-12'}
   # - custom_wrapper_html: {class: 'column small-3 end'}
-  config.wrappers :customizable_wrapper, tag: 'div', error_class: :error do |b|
+  config.wrappers :customizable_wrapper, tag: 'div', error_class: :error, valid_class: :valid do |b|
     b.use :html5
     b.optional :readonly
 
diff --git a/lib/simple_form.rb b/lib/simple_form.rb
index 385d6df9..6d00bb07 100644
--- a/lib/simple_form.rb
+++ b/lib/simple_form.rb
@@ -229,7 +229,7 @@ See https://github.com/plataformatec/simple_form/pull/997 for more information.
     SimpleForm::Wrappers::Root.new(builder.to_a, options)
   end
 
-  wrappers class: :input, hint_class: :field_with_hint, error_class: :field_with_errors do |b|
+  wrappers class: :input, hint_class: :field_with_hint, error_class: :field_with_errors, valid_class: :field_without_errors do |b|
     b.use :html5
 
     b.use :min_max
diff --git a/lib/simple_form/components/errors.rb b/lib/simple_form/components/errors.rb
index 2fd02725..b6ea6523 100644
--- a/lib/simple_form/components/errors.rb
+++ b/lib/simple_form/components/errors.rb
@@ -14,6 +14,16 @@ module SimpleForm
         object && object.respond_to?(:errors) && errors.present?
       end
 
+      def has_value?
+        return unless object && object.respond_to?(attribute_name)
+
+        object.send(attribute_name).present?
+      end
+
+      def valid?
+        !has_errors? && has_value?
+      end
+
       protected
 
       def error_text
diff --git a/lib/simple_form/wrappers/root.rb b/lib/simple_form/wrappers/root.rb
index 3a0e0cc4..f70cb00b 100644
--- a/lib/simple_form/wrappers/root.rb
+++ b/lib/simple_form/wrappers/root.rb
@@ -30,6 +30,7 @@ module SimpleForm
         end
         css << (options[:wrapper_error_class] || @defaults[:error_class]) if input.has_errors?
         css << (options[:wrapper_hint_class] || @defaults[:hint_class]) if input.has_hint?
+        css << (options[:wrapper_valid_class] || @defaults[:valid_class]) if input.valid?
         css.compact
       end
     end
diff --git a/test/form_builder/general_test.rb b/test/form_builder/general_test.rb
index a4367e8a..9aca83bd 100644
--- a/test/form_builder/general_test.rb
+++ b/test/form_builder/general_test.rb
@@ -242,6 +242,7 @@ class FormBuilderTest < ActionView::TestCase
   test 'builder generates file for file columns' do
     @user.avatar = MiniTest::Mock.new
     @user.avatar.expect(:public_filename, true)
+    @user.avatar.expect(:!, false)
 
     with_form_for @user, :avatar
     assert_select 'form input#user_avatar.file'
@@ -250,6 +251,7 @@ class FormBuilderTest < ActionView::TestCase
   test 'builder generates file for attributes that are real db columns but have file methods' do
     @user.home_picture = MiniTest::Mock.new
     @user.home_picture.expect(:mounted_as, true)
+    @user.home_picture.expect(:!, false)
 
     with_form_for @user, :home_picture
     assert_select 'form input#user_home_picture.file'