diff --git a/src/Inputs/ColorPicker.php b/src/Inputs/ColorPicker.php
index 9a3ea44..9e40274 100644
--- a/src/Inputs/ColorPicker.php
+++ b/src/Inputs/ColorPicker.php
@@ -6,7 +6,7 @@
 use Contributte\FormsBootstrap\Traits\StandardValidationTrait;
 use Nette\Utils\Html;
 
-class ColorPicker extends \Nette\Forms\Controls\ColorPicker
+class ColorPicker extends \Nette\Forms\Controls\ColorPicker implements IValidationInput
 {
 
 	use StandardValidationTrait;
diff --git a/src/Inputs/DateTimeControl.php b/src/Inputs/DateTimeControl.php
index ea7e01c..e53ff20 100644
--- a/src/Inputs/DateTimeControl.php
+++ b/src/Inputs/DateTimeControl.php
@@ -6,7 +6,7 @@
 use Contributte\FormsBootstrap\Traits\StandardValidationTrait;
 use Nette\Utils\Html;
 
-class DateTimeControl extends \Nette\Forms\Controls\DateTimeControl
+class DateTimeControl extends \Nette\Forms\Controls\DateTimeControl implements IValidationInput
 {
 
 	use StandardValidationTrait;
diff --git a/tests/Inputs/ColorPickerTest.php b/tests/Inputs/ColorPickerTest.php
index e2e0b80..d4503b7 100644
--- a/tests/Inputs/ColorPickerTest.php
+++ b/tests/Inputs/ColorPickerTest.php
@@ -3,6 +3,8 @@
 namespace Tests\Inputs;
 
 use Contributte\FormsBootstrap\BootstrapForm;
+use Contributte\FormsBootstrap\Inputs\IValidationInput;
+use Nette\Application\UI\Presenter;
 use Tests\BaseTestCase;
 
 class ColorPickerTest extends BaseTestCase
@@ -16,4 +18,21 @@ public function testDefaultTextInput(): void
 		$this->assertEquals('<label for="frm-color">Choose color</label>', (string) $input->getLabel());
 	}
 
+	public function testShowsValidationState(): void
+	{
+		$form = new BootstrapForm();
+		// Rendering a form requires a presenter with a non-empty action; see BaseTestCase users.
+		$form->setParent($this->createMock(Presenter::class));
+		$form->setAction('/');
+
+		$input = $form->addColor('color', 'Choose color');
+		$this->assertInstanceOf(IValidationInput::class, $input);
+
+		$input->addError('Foobar error message');
+
+		$html = (string) $form;
+		$this->assertStringContainsString('class="form-control is-invalid"', $html);
+		$this->assertStringContainsString('<div class="invalid-feedback">Foobar error message<br></div>', $html);
+	}
+
 }
diff --git a/tests/Inputs/DateTimeControlTest.php b/tests/Inputs/DateTimeControlTest.php
index 56605c3..4f1d31e 100644
--- a/tests/Inputs/DateTimeControlTest.php
+++ b/tests/Inputs/DateTimeControlTest.php
@@ -3,6 +3,8 @@
 namespace Tests\Inputs;
 
 use Contributte\FormsBootstrap\BootstrapForm;
+use Contributte\FormsBootstrap\Inputs\IValidationInput;
+use Nette\Application\UI\Presenter;
 use Tests\BaseTestCase;
 
 class DateTimeControlTest extends BaseTestCase
@@ -15,4 +17,21 @@ public function testDefaultDate(): void
 		$this->assertEquals('<input type="date" name="date" id="frm-date" class="form-control">', $dt->getControl()->render());
 	}
 
+	public function testShowsValidationState(): void
+	{
+		$form = new BootstrapForm();
+		// Rendering a form requires a presenter with a non-empty action; see BaseTestCase users.
+		$form->setParent($this->createMock(Presenter::class));
+		$form->setAction('/');
+
+		$dt = $form->addDate('date', 'Date');
+		$this->assertInstanceOf(IValidationInput::class, $dt);
+
+		$dt->addError('Foobar error message');
+
+		$html = (string) $form;
+		$this->assertStringContainsString('class="form-control is-invalid"', $html);
+		$this->assertStringContainsString('<div class="invalid-feedback">Foobar error message<br></div>', $html);
+	}
+
 }