diff --git a/src/Plugin/Field/FieldFormatter/ColorFieldFormatterCss.php b/src/Plugin/Field/FieldFormatter/ColorFieldFormatterCss.php
index 053191a3baddb9bb1877da4857078f34beadd327..585b192ca3a8660521cd53e93f1eaf1d6b59213c 100644
--- a/src/Plugin/Field/FieldFormatter/ColorFieldFormatterCss.php
+++ b/src/Plugin/Field/FieldFormatter/ColorFieldFormatterCss.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\color_field\Plugin\Field\FieldFormatter;
 
+use Drupal\color_field\Plugin\Field\FieldType\ColorFieldType;
 use Drupal\Core\Field\FormatterBase;
 use Drupal\Core\Field\FieldItemListInterface;
 use Drupal\Core\Form\FormStateInterface;
@@ -141,7 +142,7 @@ class ColorFieldFormatterCss extends FormatterBase {
   /**
    * {@inheritdoc}
    */
-  protected function viewValue(FieldItemInterface $item) {
+  protected function viewValue(ColorFieldType $item) {
     $opacity = $this->getFieldSetting('opacity');
     $settings = $this->getSettings();
 
diff --git a/src/Plugin/Field/FieldFormatter/ColorFieldFormatterSwatch.php b/src/Plugin/Field/FieldFormatter/ColorFieldFormatterSwatch.php
index c2ea2103e7db9020ccdd66ab77980775561c7e86..7b0b5616f5191cb0ab2786d5d645827757c76846 100644
--- a/src/Plugin/Field/FieldFormatter/ColorFieldFormatterSwatch.php
+++ b/src/Plugin/Field/FieldFormatter/ColorFieldFormatterSwatch.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\color_field\Plugin\Field\FieldFormatter;
 
+use Drupal\color_field\Plugin\Field\FieldType\ColorFieldType;
 use Drupal\Core\Field\FormatterBase;
 use Drupal\Core\Field\FieldItemInterface;
 use Drupal\Core\Field\FieldItemListInterface;
@@ -147,7 +148,7 @@ class ColorFieldFormatterSwatch extends FormatterBase {
   /**
    * {@inheritdoc}
    */
-  protected function viewValue(FieldItemInterface $item) {
+  protected function viewValue(ColorFieldType $item) {
     $opacity = $this->getFieldSetting('opacity');
     $settings = $this->getSettings();
 
diff --git a/src/Plugin/Field/FieldFormatter/ColorFieldFormatterText.php b/src/Plugin/Field/FieldFormatter/ColorFieldFormatterText.php
index eba6199cb5434ed4550881ae55877a858ea813b6..b6ef971cb03191a19571de9985d3575ea79760fa 100644
--- a/src/Plugin/Field/FieldFormatter/ColorFieldFormatterText.php
+++ b/src/Plugin/Field/FieldFormatter/ColorFieldFormatterText.php
@@ -7,7 +7,7 @@
 
 namespace Drupal\color_field\Plugin\Field\FieldFormatter;
 
-use Drupal\Core\Field\FieldItemInterface;
+use Drupal\color_field\Plugin\Field\FieldType\ColorFieldType;
 use Drupal\Core\Field\FieldItemListInterface;
 use Drupal\Core\Field\FormatterBase;
 use Drupal\Core\Form\FormStateInterface;
@@ -114,7 +114,7 @@ class ColorFieldFormatterText extends FormatterBase {
   /**
    * {@inheritdoc}
    */
-  protected function viewValue(FieldItemInterface $item) {
+  protected function viewValue(ColorFieldType $item) {
     $opacity = $this->getFieldSetting('opacity');
     $settings = $this->getSettings();